✶Explainer04:30
Why Gazelles Stop and Stare at Cheetahs Instead of Running
Scrivner describes 'predator inspection' — a documented behavior where gazelles and zebras will pause and actively observe a nearby predator rather than flee, especially when they're adolescent, in a large group, or at a safe distance. He argues human storytelling lets us get the same threat-learning benefit without any of the real-world risk.
- Zebras and gazelles will watch lions/cheetahs rather than flee under certain conditions (called 'predator inspection')
- More likely when adolescent, in a large group, or far from the predator
- Prey animals live among predators who aren't always hunting, so learning to read their state matters
- Humans can get the same learning benefit through stories without being physically present in danger
“We can kind of gain the learning benefits of predator inspection without actually being in any danger. And that's really that's like candy for our…”
#evolution#predator-inspection#animal-behavior#morbid-curiosity
✶Explainer06:00
Why a Street Fight Disturbs You But the UFC Doesn't
Scrivner unpacks why paying to watch UFC feels different from witnessing a street fight or rubbernecking a crash: control, safety, and disgust sensitivity. People high in disgust sensitivity may avoid a horror movie but still read a book on the same topic, because a book gives them more control over how vivid the imagery becomes.
- Perceived safety/control changes whether we enjoy versus merely feel drawn to violent content
- Disgust sensitivity varies by person and affects tolerance for gore
- Books give more control over vividness than film, which is dictated entirely by the director
- High-disgust people may read about violence but avoid watching it on screen
“If you're high in disgust sensitivity, you may not watch a horror movie. You might be willing to read a book about the same topic…”
#disgust#control#media-psychology#ufc
✶Explainer08:00
The Four Domains of Morbid Curiosity
Using survey data built from scratch (no prior scale existed), Scrivner identified four distinct domains people are morbidly curious about: witnessing violence, minds of dangerous people (true crime), the outcome of violence (bodily injury), and the supernatural/paranormal. He explains each domain's evolutionary logic, including why paranormal beliefs may function as a way to reason about unknown, malicious agents.
- Domain 1: witnessing violence itself
- Domain 2: minds of dangerous people (true crime)
- Domain 3: bodily injury/violation — important for treating wounds and inferring what caused them
- Domain 4: supernatural/paranormal — tied to reasoning about unknown, unseen, malicious threats (referencing Ed Hagen & Aaron Lightner's research)
- Before germ theory, disease was often explained via witches or gods — an unknown malicious agent narrative
“You come across someone in the forest and their whole arm is missing, that's a different story, right? That means there's something really large and…”
#morbid-curiosity#taxonomy#true-crime#supernatural
✶Explainer18:00
Why We Dream About Predators (and Being Hunted)
Scrivner explains a leading theory that dreaming exists partly to rehearse threats offline, cheaply, without the cost of real danger. He cites a 1960s cat study where severing a paralysis-inducing brain connection caused sleeping cats to physically act out hunting or fleeing behaviors, and an anthropologist's fieldwork with the Mehinaku people showing predator-related themes dominate reported dreams.
- Dreaming is a high-investment cognitive activity theorized to rehearse threat scenarios safely
- In a 1960s study, cats with severed paralysis pathways physically acted out hunting/being-hunted movements while asleep
- The Mehinaku people reliably recount dreams, and predators (jaguars, snakes) and dangers dominate their reported dream content
- Threats show up broadly in dreams, not just in nightmares — nightmares are a narrower, more terrifying subset
“One of the most influential and empirically backed theories for why dreaming exists is that it's really good at rehearsing threats when you're sort of…”
“Cats almost always got up and moved around in these sort of either predatorial types of ways or prey types of ways where they were…”
#dreams#sleep#evolution#threats
✶Explainer23:30
What Actually Predicts Morbid Curiosity (and What Doesn't)
Scrivner ran a large personality study testing whether traits like the Big Five/HEXACO, psychopathy, disgust sensitivity, age, and sex predict morbid curiosity. Even combining every predictor, he could only explain about 50% of the variance. The strongest single predictor was the 'rebelliousness' subscale of subclinical psychopathy; disgust sensitivity, surprisingly, barely mattered.
- Best combined model of all personality measures explained only ~50% of variance in morbid curiosity scores
- Rebelliousness (a psychopathy subscale) was the single strongest correlate
- Disgust sensitivity was only weakly correlated — much less than expected
- Morbid curiosity decreases with age, mirroring adolescent gazelles doing the most predator inspection
- Men score higher on interest in violence; women score higher on interest in the minds of dangerous people
“The closest I got when I included all of the significant predictors was about 50%.”
#psychopathy#personality#individual-differences#age#gender
✶Explainer45:00
Why Ambiguous Police Body Cam Footage Goes Viral
Scrivner explains why police body cam footage draws a large YouTube audience: the most-watched clips tend to be the most ambiguous ones, where it's unclear whether the person was armed or aggressive. This ambiguity lets viewers rehearse how they'd interpret and react in the same high-stakes encounter.
- Police body cam footage matters because encountering police is a realistic scenario people could find themselves in
- News coverage skews toward the worst, most ambiguous police encounters
- Ambiguity (did they have a weapon? were they aggressive?) is what drives viewer interest and engagement
- Viewers use the footage to rehearse their own interpretation and hypothetical response
“I think in particular those really violent, ambiguous police videos are what really get people paying attention.”
#police#bodycam#media#ambiguity
✶Explainer47:30
The Real Definition of a Horror Movie
Scrivner presents his own research (analyzing ~600 films) defining the horror genre not by how scared the audience feels, or the director's intent, but by the structural relationship between characters: a very formidable antagonist paired with a very vulnerable protagonist — a story archetype no other genre reliably uses.
- Prior definitions of horror (based on audience fear or director's intent) are inconsistent and subjective
- His empirical analysis of ~600 films found horror reliably pairs a highly vulnerable protagonist with a highly formidable antagonist
- This underdog structure is what makes horror distinctly appealing to morbidly curious audiences
- The protagonist typically has no real means of escape yet usually survives anyway
“It seems like in horror movies... horror movies feature very vulnerable protagonists and very formidable antagonists.”
#horror#film#genre-definition#research
✶Explainer50:00
Why Zombie Movies Are So Universally Popular
Scrivner explains that zombie fiction is uniquely appealing because it's one of the only genres that reliably taps all four domains of morbid curiosity at once: minds of dangerous people (is anything human left?), violence, the paranormal/uncertain (alive or dead?), and bodily violation (gruesome injuries) — which he says explains why franchises like World War Z, I Am Legend, and The Walking Dead do so well commercially.
- Zombies tap the 'dangerous minds' domain — is there still a human consciousness inside?
- They tap the violence domain directly through attacks and often intergroup conflict among survivors
- They tap the paranormal domain via ambiguous alive/dead status
- They tap the body-violation domain through graphic injuries
- This combination explains the commercial success of zombie franchises (World War Z, I Am Legend, The Walking Dead)
“I think zombie movies sort of reliably tap into all four domains of morbid curiosity, which makes them really appealing.”
#zombies#horror#film#morbid-curiosity