Human BodySenses
There is a hole in your vision and your brain paints over it.
Where the optic nerve exits your eye there are no sensors, so your brain invents it.
Source
This fact is written from the English Wikipedia article it links to, so you can check every word in one tap. Fact Drop rates that source 4 out of 5 for credibility, and the rating travels with the fact on the back of its card in the app.
More human body facts
Human body facts about the one you are sitting in. Roughly 8% of your DNA came from ancient viruses, you almost certainly have mites living on your face, and a newborn can breathe and swallow at the same time. Every fact links to the reference behind it.
- Your eyes jump several times a second and you go briefly blind during each jump.
- A muscle in your middle ear tightens a fraction of a second before you speak.
- Smell is the only sense that does not route through the brain's central relay station first.
- The tongue map with sweet at the tip and bitter at the back came from a mistranslated German paper.
- Your taste buds are completely replaced every ten days.
- Your cornea has no blood supply.