The strangest machine you own
Your body breaks every rule it taught you in biology class.
- 01
The Chemical Shield Inside Your Gut
Your stomach produces acid strong enough to dissolve steel, but a layer of snot keeps you alive.
- 02
The Greedy Three Pound Organ
Your brain weighs almost nothing but consumes 20 percent of every calorie you eat.
- 03
The Only Part of Your Body That Breathes Air Directly
Your cornea has zero blood vessels and must suck oxygen from the atmosphere to stay alive.
- 04
The Nostalgic Highway Inside Your Brain
Your sense of smell is the only sense that bypasses the brain's main switchboard, hitting your emotions instantly.
- 05
You Are Only Half Human
There are roughly 38 trillion bacterial cells in your body, meaning you are technically more bacteria than you are 'you'.
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The Greedy Three Pound Organ
Your brain weighs almost nothing but consumes 20 percent of every calorie you eat.
The 60,000 Mile Highway Inside Your Body
If you unraveled every blood vessel in a single adult body, they would wrap around the Earth twice.
The Nostalgic Highway Inside Your Brain
Your sense of smell is the only sense that bypasses the brain's main switchboard, hitting your emotions instantly.
The Color of Sound That Boosts Memory
Pink noise is the secret frequency that synchronizes your brain waves for a deeper, more restorative sleep.
The Only Body Part That Breathes Air Directly
Your cornea is the only part of your body that gets its oxygen from the air rather than your blood.
The acid in your belly melts steel
Your stomach produces a liquid so corrosive it can dissolve a stainless steel razor blade in less than half a day.
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See all →Your brain has 86 billion neurons. They're alien
And each one connects to thousands of others.
You replace 330 billion cells every day
You're not the same person you were last month.
Your eyes can actually see single photons
The most sensitive instrument you'll ever own.
The Tail You Kept After Losing The Tail
Your tailbone is not a useless leftover; it provides the essential anchor point for the muscles that keep your organs in place.
Your immune system dies every three days
While red blood cells last for months, most white blood cells survive for only 1 to 3 days in your bloodstream.
The Color of Sound That Boosts Memory
Pink noise is the secret frequency that synchronizes your brain waves for a deeper, more restorative sleep.
Explore other rabbit holes
All categories →Glass frogs, immortal jellyfish, and shrimp that punch faster than bullets.
More of Earth is underwater than mapped. The strangest life on the planet hides down there.
Storms, eruptions, and creatures so deadly evolution made them glow.
The kind of fact you immediately text to a friend.
Black holes, dying stars, and worlds where it rains diamonds.
Phenomena science has measured, recorded, and failed to solve.
Dinosaurs, mass extinctions and the planet that came before this one.
Optical tricks, memory glitches and the colours that don't really exist.
Tardigrades, viruses and the invisible kingdoms living on you.
Quantum entanglement, time dilation and experiments that broke physics.