A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The head of a jellyfish is called the "Bell."
6