Free cheat sheet · PDF
Myths busted
A printable poster of popular myths and the truth behind them.
1 page, US Letter size, 34 KB. Free, no sign-up.
Sources: Sources for each myth are listed on its So Many Facts page. Checked October 2026.
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Printing tips
- Print at actual size (100%), not "fit to page", so the lines stay a usable size.
- It is laid out for US Letter paper and also fits A4.
- Turn on "background graphics" if the colors come out pale.
What is on this cheat sheet
The truth
- Studies show goldfish can remember things for months and can be trained to respond to sounds and lights.
- Bulls cannot see red well. It is the movement of the matador’s cape that provokes them.
- All bats can see, and many fruit bats have excellent eyesight. Many bats also use echolocation.
- Brain scans show activity across the whole brain, and damage to almost any area causes problems.
- Tall structures are struck again and again. The Empire State Building is hit around 20 times a year.
- Studies have found no link between knuckle cracking and arthritis.
- Ostriches lower their heads to the ground to turn their eggs or to hide by lying flat, which may look like burying from a distance.
The myth
- Goldfish have a three-second memory.
- Bulls get angry when they see the colour red.
- Bats are blind.
- We only use 10% of our brains.
- Lightning never strikes the same place twice.
- Cracking your knuckles causes arthritis.
- Ostriches bury their heads in the sand when scared.
