You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
Researchers say that lining the toilet seat with paper is pretty much pointless
8
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
22
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The word "impossible" dropped in use by 50% over the course of the 20th century
5