An octopus has three hearts.
Humans share 50% of their DNA with bananas.
Sound travels up to 15 times faster through steel than air, at speeds up to 19,000 feet per second.
The soil on Mars is rust color because it's full of rust.
Remove all the space between its atoms and Earth would be the size of a baseball.
The official taxonomic classification for llamas is Llama glama.
Giraffes have the same number of vertebrae as humans: 7.
Benjamin Franklin invented flippers.
The glue on Israeli postage stamps is certified kosher.
A soup can full of neutron star material would have more mass than the Moon.