19 Supported by research
When people are instructed in an fMRI to think about nothing, their mind wanders and the default mode network becomes active.
"When when we put people into the fMRI and you say, "Think about nothing," you can't do it. You immediately your mind just starts wandering, and the default mode network of the brain becomes active" (said at 0:18:24)
Functional MRI (fMRI) studies consistently show that resting-state conditions—such as when participants are instructed to rest, fixate, or think about nothing without an external cognitive task—foster spontaneous, stimulus-independent thoughts (mind-wandering) and robustly recruit the default mode network (DMN). Foundational and contemporary neuroimaging studies demonstrate that mind-wandering episodes during rest and low-demand tasks reliably activate the DMN.
100,000 people died of drug overdoses in the last year.
"We created analgesics that got that escalated in power to the point we're able literally to get rid of all of the pain, and 100,000 people died of drug overdoses last year as a result." (said at 0:18:56)
National vital statistics data from the Centers for Disease Control and Prevention (CDC) confirm that annual drug overdose deaths in the United States surpassed 100,000 per year during the peak of the overdose crisis (2021–2023), largely driven by potent synthetic opioids such as illicit fentanyl, before beginning to decline in 2024.
In Dan Gilbert's boredom experiments, 25% of women and two-thirds of men chose to administer painful electric shocks to themselves rather than sit in an empty room for 15 minutes.
"Dan Gilbert's experiments at Harvard on boredom, he shows that when people have to sit in a room with nothing to do except the option of pushing a button on a key fob to self-administer a painful electric shock, that 25% of women choose to shock themselves rather than being bored, and two-thirds of the dudes shock themselves painfully rather than being bored for just 15 minutes." (said at 0:19:27)
In a 2014 study co-authored by Daniel Gilbert and Timothy Wilson published in Science (PMID: 24994650), researchers evaluated participants asked to spend 15 minutes alone in an unstimulating room with only their thoughts. Participants had the option to press a button to self-administer an electric shock that they had previously rated as unpleasant and indicated they would pay to avoid. During the 15-minute period, 67% (two-thirds, 12 of 18) of men and 25% (6 of 24) of women chose to self-administer at least one electric shock rather than sit without external stimulation.
In the psychological experiment where participants could choose between sitting with their thoughts or receiving an electric shock, one subject shocked himself 190 times in 15 minutes.
"Yeah, in the experiment, one guy shocked himself 190 times in 15 minutes." (said at 0:19:59)
In a series of psychological experiments by Wilson et al. (2014), participants were asked to sit alone in a room for 6 to 15 minutes with only their thoughts, with an option to self-administer electric shocks. A significant portion of participants (particularly men) chose to shock themselves rather than remain alone with their thoughts, including one extreme outlier who self-administered 190 shocks during the 15-minute period.
Studies of identical twins separated at birth conducted at the University of Minnesota show that positive and negative affect profiles are between 40% and 80% genetically determined.
"Most of this stuff is between 40 and 80% genetic, and we know this from identical twins separated at birth. You know those identical twin studies they did at University of Minnesota for all those years." (said at 0:47:35)
The claim is supported by publications from the Minnesota Study of Twins Reared Apart (MISTRA) conducted at the University of Minnesota. In studies assessing personality and affect using instruments like the Multidimensional Personality Questionnaire (which evaluates higher-order dimensions of Positive Emotionality and Negative Emotionality), Tellegen and colleagues found that estimated heritabilities across scales ranged from approximately 39% to 58%, with subsequent analyses of the stable, trait-like component of subjective well-being across time reaching up to ~80%. Under GRADE criteria, quantitative genetic and observational twin studies provide low certainty evidence.
People with clinical depression have high activity in the ventrolateral prefrontal cortex, and increased serotonin in the synapse lowers activity in that region.
"So, people who have clinical depression, high activity in the ventrolateral prefrontal cortex. And when there's more serotonin in the synapse, you find that that what it does is it lowers the activity in the ventrolateral prefrontal cortex." (said at 0:51:45)
Functional neuroimaging and positron emission tomography (PET) studies in patients with major depressive disorder demonstrate elevated baseline metabolic activity in the ventrolateral prefrontal cortex (VLPFC) and orbitofrontal regions. Treatment with selective serotonin reuptake inhibitors (SSRIs), which increase synaptic serotonin availability, is associated with significant reductions in VLPFC glucose metabolism and neural activation among treatment responders.
Greek yogurt contains high amounts of the amino acid tryptophan.
"Greek yogurt has a lot of tryptophan in it and that will actually hold you." (said at 0:59:42)
Dairy products and milk proteins provide substantial amounts of the essential amino acid tryptophan. Analytical profiling of commercial yogurts demonstrates that Greek-style yogurt has the highest tryptophan content among tested yogurt types (up to ~122 mg per 100 g in cow Greek-type yogurt), reflecting its concentrated protein content from the straining process.
Language centers of the human brain are localized in the left hemisphere.
"the language centers in your brain are in the left hemisphere and I asked you a right hemisphere question." (said at 1:08:44)
Extensive neuroimaging and clinical lesion evidence confirms that core language centers and the primary language network (such as Broca's and Wernicke's areas) are localized predominantly in the left cerebral hemisphere in the vast majority of individuals (approximately 95% of right-handed and 70% of left-handed individuals). While the right hemisphere plays supporting roles in prosody, narrative comprehension, and pragmatic processing, primary language production and comprehension functions remain strongly left-lateralized.
- supports: Leftward asymmetry of the planum temporale and its association with language. (Brain structure & function 2025) · cited 3x in the literature
"The planum temporale overlaps with Wernicke's area, a core structure in the brain network involved in sensory language processing. Therefore, several studies have investigated the association between macrostructural leftward asymmetries of the planum temporale and functional leftward asymmetries in language processing." (abstract, background, passage verified)
pubmedfull study (doi) - supports: Language remains strongly left-lateralized in older adults: A cross-sectional and longitud… (bioRxiv : the preprint server for biology 2026)
"Language activation was strongly left-lateralized, with 96% of participants classified as left-lateralized and 3% as right-lateralized." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Preserved topography, lateralization, selectivity, and functional connectivity of the lang… (Nature communications 2026)
"In contrast, we find remarkable preservation of the language network in older adults: it responds during language comprehension as strongly and selectively as in younger adults, with similar left-hemispheric lateralization and within-network functional connectivity." (abstract, results, passage verified)
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Contemporary popular music is objectively less melodic than music from past eras.
"music is objectively less melodic than it's been in the past, which actually affects us neurophysiologically." (said at 1:15:54)
Large-scale computational analyses of popular music over several decades confirm that melodies have become measurably simpler and less complex over time. A 2024 analysis of US chart-topping melodies from 1950 to 2023 identified significant melodic 'revolutions' in 1975, 1996, and 2000 marked by sharp decreases in pitch and rhythmic complexity alongside increases in note density. Broader network analyses of Western music across genres similarly demonstrate historical trends toward reduced complexity in both melodic and harmonic structures.
Observing acts of service or charity induces a state known as moral elevation in humans.
"When you see somebody serving somebody else, when you will see beauty, when you allow somebody to serve you in just pure love and pure charity, it gives you what the psychologist Rhett Diessner calls moral elevation." (said at 1:17:04)
Extensive empirical psychological research confirms that witnessing or observing virtuous deeds, charity, and acts of service elicits an emotional and psychological state known as moral elevation. Rhett Diessner and colleagues have extensively published on the concept of 'Engagement with Moral Beauty' and its role in experiencing moral elevation when observing prosocial behaviors.
The dorsal anterior cingulate cortex processes the affective distress associated with physical pain and social rejection.
"sensory pain where the nerve endings are indicating that there's a problem—ouch—immediately leads to the affective part where the dorsal anterior cingulate cortex of the limbic system says, "I hated that," right? So ouch and I hate it are the two parts of pain. Now, when you have mental pain, it's only the second part. So if somebody rejects you, if somebody says, "Your work is stupid. You're a hack," your dorsal anterior cingulate cortex is going to go into overdrive" (said at 1:14:45)
Neuroimaging literature supports the claim that the dorsal anterior cingulate cortex (dACC) plays a central role in processing the affective/unpleasantness component of physical pain as well as the distress associated with social rejection and exclusion. Seminal fMRI work and subsequent meta-analyses of dozens of neuroimaging studies confirm significant activation in the dorsal and ventral ACC during social exclusion paradigms (such as Cyberball) and correlate this activation with subjective self-reported distress.
- supports: Does rejection hurt? An FMRI study of social exclusion. (Science (New York, N.Y.) 2003) · cited 3830x in the literature
"Paralleling results from physical pain studies, the anterior cingulate cortex (ACC) was more active during exclusion than during inclusion and correlated positively with self-reported distress." (abstract, results, passage verified)
pubmedfull study (doi) - supports: A meta-analysis of the anterior cingulate contribution to social pain. (Social cognitive and affective neuroscience 2015) · cited 325x in the literature
"Significant likelihoods of activation were found in both the ventral and dorsal ACC for both social pain elicitation and self-reported distress during social pain." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Social pain and the brain: controversies, questions, and where to go from here. (Annual review of psychology 2015) · cited 371x in the literature
"Emerging evidence has shown that social pain--the painful feelings that follow from social rejection, exclusion, or loss--relies on some of the same neural regions that process physical pain, highlighting a possible physical-social pain overlap." (abstract, background, passage verified)
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Writing about one's feelings reduces emotional intensity by shifting neural processing from the limbic system to the prefrontal cortex.
"You know, people find when they write about their feelings that their feelings don't feel so intense. The reason is cuz you can't actually write with your limbic system; you have to write with your prefrontal cortex. You want to move the experience of your emotions to the executive centers of your brain." (said at 1:31:49)
Neuroimaging studies on affect labeling (putting feelings into words) and expressive writing show that linguistic encoding of emotional experiences engages prefrontal regions—particularly the right ventrolateral prefrontal cortex (RVLPFC)—which in turn exerts an inhibitory downregulatory effect on the amygdala and other limbic regions, reducing emotional reactivity.
- supports: Putting feelings into words: affect labeling disrupts amygdala activity in response to aff… (Psychological science 2007) · cited 1147x in the literature
"The results indicated that affect labeling, relative to other forms of encoding, diminished the response of the amygdala and other limbic regions to negative emotional images. Additionally, affect labeling produced increased activity in a single brain region, right ventrolateral prefrontal cortex (RVLPFC). Finally, RVLPFC and amygdala activity during affect labeling were inversely correlated, a relationship that was mediated by activity in medial prefrontal cortex (MPFC)." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Advancing understanding of affect labeling with dynamic causal modeling. (NeuroImage 2013) · cited 83x in the literature
"Modulatory effects of labeling were most prominently observed following Bayesian Model Averaging, with the dampening influence on amygdala originating from Broca's area but much more strongly from right vlPFC. These results solidify and extend previous correlation and regression-based estimations of negative corticolimbic coupling." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Neural activity during affect labeling predicts expressive writing effects on well-being: … (Social cognitive and affective neuroscience 2017) · cited 31x in the literature
"Affect labeling (putting feelings into words) is a form of incidental emotion regulation that could underpin some benefits of expressive writing (i.e. writing about negative experiences). ... Consistent with affect labeling research, right ventrolateral prefrontal cortex (RVLPFC) and amygdalae were top predictors of improvement in the four outcomes." (abstract, results)
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A meta-analysis of randomized controlled trials shows that exercise, including running, is as effective as standard of care treatments such as cognitive behavioral therapy, psychotherapy, and SSRIs at improving depressive symptoms, and is superior to placebo or no treatment.
"new study and new meta-analysis of studies came out, randomized trials comparing exercise, running exercise, to standard of care treatments, whether that be cognitive behavioral therapy, traditional psychotherapy, including CBT, also SSRIs, and exercise was as good as either of those at improving depressive symptoms. This is multiple studies. It was obviously better than placebo or no treatment." (said at 2:00:20)
A large 2024 network meta-analysis of 218 randomized controlled trials (14,170 participants) published in the BMJ found that exercise modalities—particularly walking or jogging, strength training, and yoga—produced clinically meaningful reductions in depression symptoms compared to active controls, placebos, or usual care. The analysis evaluated exercise relative to psychotherapy and pharmacotherapy (such as SSRIs) and concluded that exercise modalities display comparable effectiveness and can be considered core treatments alongside standard-of-care options. Direct randomized comparisons between running therapy and SSRIs (e.g., the MOTAR trial) similarly demonstrate comparable symptom remission rates. The certainty of evidence is moderate, primarily downgraded because participant and provider blinding is rarely possible in exercise interventions, leading to potential performance bias across many trials.
- supports: Antidepressants or running therapy: Comparing effects on mental and physical health in pat… (Journal of affective disorders 2023) · cited 113x in the literature
"Intention-to-treat analyses showed that remission rates at T16 were comparable (antidepressants: 44.8 %; running: 43.3 %; p = .881)." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Effect of exercise for depression: systematic review and network meta-analysis of randomis… (BMJ (Clinical research ed.) 2024) · cited 597x in the literature
"Compared with active controls (eg, usual care, placebo tablet), moderate reductions in depression were found for walking or jogging (n=1210, κ=51, Hedges' g -0.62, 95% credible interval -0.80 to -0.45), yoga (n=1047, κ=33, g -0.55, -0.73 to -0.36), strength training (n=643, κ=22, g -0.49, -0.69 to -0.29)... These forms of exercise could be considered alongside psychotherapy and antidepressants as core treatments for depression." (abstract, results and conclusions, passage verified)
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Novel experiences increase BDNF (brain-derived neurotrophic factor) and support neuroplasticity.
"I know how important that is for novel experiences itself is helps with BDNF. Obviously, exercise does, too, but like neuroplasticity." (said at 2:05:05)
Preclinical animal research demonstrates that exposure to novel environments and stimuli triggers brain-derived neurotrophic factor (BDNF) expression and activates its receptor (TrkB) in key brain structures such as the hippocampus, cortex, and prefrontal cortex. This novelty-induced upregulation of BDNF acts as a plasticity-related protein essential for synaptic plasticity, memory consolidation, and long-term potentiation. Because direct causal evidence for this mechanism comes from animal models, the certainty of evidence for humans is graded as very low.
- supports: BDNF signaling during learning is regionally differentiated within hippocampus. (The Journal of neuroscience : the official journal of the Society for Neuroscience 2010) · cited 39x in the literature
"A 30 min exposure to a novel, complex environment caused a marked, NMDA receptor-dependent increase in postsynaptic densities associated with activated (phosphorylated) Trk receptors in rostral hippocampus." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Behavioural tagging: Effect of novelty exploration on plasticity related molecular signatu… (Experimental brain research 2021) · cited 7x in the literature
"Here our results point out that this novelty exploration acts as a modulator in memory consolidation by providing PRPs such as brain-derived neurotrophic factor (BDNF), cAMP response element-binding protein (CREB), enhancing neurotransmitters (Dopamine), IEGs (cFos)..." (abstract, results, passage verified)
pubmedfull study (doi) - supports: TrkB-BDNF Signalling and Arc/Arg3.1 Immediate Early Genes in the Anterior Cingulate Cortex… (Molecular neurobiology 2024) · cited 2x in the literature
"Brain-derived neurotrophic factor (BDNF) stands as a pivotal plasticity-related protein (PRP) in mediating molecular alterations crucial for long-term synaptic plasticity and memory consolidation... Introducing novelty around weak inhibitory avoidance (IA) training resulted in heightened step-down latencies and expression of these molecules, respectively." (abstract, results)
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Lifelong smokers have a 7 in 10 chance of dying from a smoking-related illness.
"lifelong smokers have a seven in 10 chance of dying of a smoking-related illness, and that's an unhappy way to go." (said at 2:07:00)
Contemporary large-scale prospective cohort studies and epidemiological syntheses confirm that approximately two-thirds (around 67% to 70%) of deaths in lifelong or continuing smokers are caused by smoking-attributable diseases. In mature smoking epidemics, continuing smokers experience roughly a threefold higher all-cause mortality rate compared to never-smokers, losing approximately 10 years of life expectancy.
- supports: The 21st century hazards of smoking and benefits of stopping: a prospective study of one m… (Lancet (London, England) 2013) · cited 842x in the literature
"Among UK women, two-thirds of all deaths of smokers in their 50s, 60s, and 70s are caused by smoking; smokers lose at least 10 years of lifespan." (abstract, interpretation, passage verified)
pubmedfull study (doi) - supports: Tobacco smoking and all-cause mortality in a large Australian cohort study: findings from … (BMC medicine 2015) · cited 281x in the literature
"In Australia, up to two-thirds of deaths in current smokers can be attributed to smoking. Cessation reduces mortality compared with continuing to smoke, with cessation earlier in life resulting in greater reductions." (abstract, conclusions, passage verified)
pubmedfull study (doi) - supports: The hazards of smoking and the benefits of cessation: a critical summation of the epidemio… (eLife 2020) · cited 190x in the literature
"Up to two-thirds of deaths among smokers are avoidable at non-smoking death rates, and former smokers have about only a quarter of the excess risk of death compared to current smokers." (abstract, passage verified)
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Lifelong learning and high neuroplasticity preserve synaptic connectivity and allow individuals to maintain cognitive functioning even in the presence of physical neurocognitive brain degradation.
"People who have a life of the mind and are highly neuroplastic, they're just happier and healthier. And by the way, even if they have a whole lot of degradation, neurocognitive degradation, physically, they do better. You know, if you're learning a lot, your brain can hollow out practically, and you're still going to have enough of the connections, synaptically, in your brain that you're going to be able to function for a much, much, much longer time." (said at 2:08:27)
The speaker describes the cognitive reserve hypothesis, which posits that intellectual engagement, lifelong learning, and neural adaptability allow individuals to maintain higher cognitive functioning and clinical performance despite underlying physical neuropathology (such as Alzheimer's disease pathology, Lewy bodies, or vascular brain damage). Postmortem clinicopathologic cohort studies confirm that higher participation in cognitively stimulating activities throughout adulthood significantly accounts for preserved cognitive performance relative to measurable brain pathology burden.
Studies show that even when people know social media displays curated, non-accurate versions of lives, they still believe the depictions.
"there's a couple of papers that shows that even if we know it's a lie, we still believe the lie. And even if we're participating in the lie, nobody puts on social media, "My wife just yelled at me again. Brutal." Nobody puts that on. "My kid just flunked math for the fourth time." Nobody puts that on there. And so, you know you're curating a version of your life that's not an accurate version of your life, and you know that you're consuming a curated version of other people's lives as well, but you still believe it." (said at 2:11:36)
Research on social media psychology and media presentation supports the concept that cognitive awareness of curation or digital manipulation does not reliably counteract social comparison or negative psychological reactions. Systematic and scoping reviews investigating disclaimer labels, media disclosures, and awareness of digitally altered or idealized imagery demonstrate that while explicit warnings increase cognitive awareness of image manipulation, they largely fail to mitigate upward social comparisons or associated distress, with viewers continuing to evaluate themselves against curated depictions.
In the Harvard Study of Adult Development, the relationship types most strongly correlated with happiness and wellness in older age are strong marriage and close personal friendships.
"what they find is that the two kinds of relationships that are most correlated with happiness and wellness is marriage and and or friends. You don't have to be married, and not everybody's marriage works out, but isolation from other people that are not just your children." (said at 2:13:35)
Findings from the longitudinal Harvard Study of Adult Development support the claim that strong, secure intimate relationships (such as marriage) and close personal support networks (friends) are key predictors of late-life health, subjective well-being, and cognitive outcomes, whereas social isolation or low security of attachment to partners is detrimental. For instance, research examining couples within the cohort demonstrated that higher security of attachment to spouses was significantly linked to lower depression, fewer marital conflicts, and greater life satisfaction and emotional well-being over time (PMID 26413428). Furthermore, long-term tracking of the study's participants shows that non-kin emotional support networks and nurturing relational environments significantly contribute to socioemotional well-being across adulthood (PMID 39146058).
Findings from the Harvard Study of Adult Development (Grant Study) show that individuals who age to be both healthy and happy are characterized by seven specific factors: healthy diet, regular exercise, absence of smoking, moderation in alcohol/substance use, lifelong learning, effective coping mechanisms for life's challenges, and strong loving relationships (marriage or close friendships).
"You've heard of the Harvard Study of Adult Development, the Grant Study. That's following the same cohort 85 years now, starting in the late '30s... it turns out that almost all of the people in that quadrant—there's a lot of people who are unhealthy, a lot of people who are unhappy, but the ones who are happy and well did seven things, okay? Seven things. Now, some of them were obvious: diet, exercise, smoking, and drinking... Then there's the three that are not the obvious ones. Number one is continuing to learn... Two more is your technique for dealing with life's problems... And last but not least is the biggie, which is love." (said at 3:25:27)
Findings from the Harvard Study of Adult Development (including the Grant Study cohort of college men and the Glueck Study cohort of inner-city youth followed prospectively for over 60 years) identified seven controllable midlife predictor variables measured before age 50 that predicted late-life "happy-well" outcomes versus "sad-sick" or premature mortality at ages 70–80. These seven factors are non-smoking, mature coping mechanisms (adaptive defenses), absence of alcohol abuse, healthy weight/BMI, marital stability/strong relationships, regular exercise, and higher education/learning.
- supports: Successful aging. (The American journal of psychiatry 2001) · cited 339x in the literature
"Predictor variables assessed before age 50 included six variables reflecting uncontrollable factors: parental social class, family cohesion, major depression, ancestral longevity, childhood temperament, and physical health at age 50 and seven variables reflecting (at least some) personal control: alcohol abuse, smoking, marital stability, exercise, body mass index, coping mechanisms, and education." (abstract, results, passage verified)
pubmedfull study (doi)
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