Why You're Scared of Sharks but Fine with Cows
Hook
You watch a shark documentary. Or maybe it's a clip on Instagram — a GoPro, churning water, a dark fin. Your heart rate goes up. You feel it.
Next time you're at the beach, something shifts. You hesitate. You keep scanning the water. Maybe you just... don't go in as deep.
Meanwhile, cows kill more people per year than sharks. By a lot.
You are not afraid of cows.
Why is your brain so bad at this?
What's Actually Happening?
Your brain doesn't have a calculator built in. It can't quickly run actual statistics — it doesn't know the real numbers, and even if it did, it would be slow. So it takes a shortcut:
If I can easily picture it, it must be common.
This is the Availability Heuristic. Your brain judges how likely or dangerous something is based on how easily an example pops into your head.
Shark attack? Your brain can conjure a vivid image immediately — dramatic music, blood in the water, the movie poster for Jaws that's been burned into human culture for 50 years. That mental image is available, so your brain ranks it as a serious risk.
Cow accident? You literally cannot remember the last time you saw that covered anywhere. It's not in movies, not in the news, not in your feed. So your brain goes: probably not a big deal.
Your brain is not lying to you. It's doing its best with the tools it has. The problem is: those tools were built for a world where the things you could easily imagine were actually common in your life. Now we live in a world where media, algorithms, and content creators decide what you can easily imagine — and they have very different priorities than "accurately representing statistical reality."
Real Life on Your Screen
Plane crashes vs. car crashes: Plane crashes make international news for weeks. Car crashes happen every day and barely get a local mention. Result: people are terrified of flying, relaxed about driving — even though driving is statistically far more dangerous per mile.
Crime: If your feed is full of crime content (and the algorithm loves drama), you start feeling like the world is more dangerous than it actually is. Studies show people consistently overestimate crime rates when they consume more news.
Rare diseases: You watch a documentary or see a few TikToks about a rare illness. Suddenly you're googling your own symptoms at 2am. The illness hasn't become more common — it's just more available in your mind.
Influencer lifestyle: You see highlight reels of people your age who are somehow wealthy, successful, and have their whole life together. That becomes what feels "normal" — even though it's the extreme outlier. You feel behind. You're not. You're just experiencing an availability distortion.
Viral failures: One video of something going horribly wrong spreads to millions. Your brain files it as "this happens all the time." It doesn't.
How to Catch It
You're probably dealing with the Availability Heuristic when:
- Your gut feeling about risk doesn't match what the numbers actually say
- Your worry spiked right after seeing related content
- You can easily picture a vivid, dramatic example of the bad thing
- The risk feels very immediate even though you haven't personally encountered it
- You feel like something is "everywhere" — but it might just be in your feed
The question to ask: Has this actually gotten more common, or have I just seen more content about it lately?
Those are very different things. Your algorithm is not a news editor with a commitment to proportion and accuracy. It is a machine optimized for your engagement. Dramatic, vivid, emotional content gets shown more. That's not reality — that's entertainment economics.
Your Challenge
Pick one thing you're genuinely a bit scared of or worried about — something that makes you anxious when you think about it.
Now actually look up the numbers. What are the real odds? How does it compare to other risks you don't think about at all?
You don't have to become fearless. Some fears are rational! But check if the intensity of your fear actually matches the probability of the thing happening.
You might be surprised how much your worry is running on vibes and vivid clips rather than reality. And once you see that — you can't un-see it.