Frogs sometimes eat enough fireflies that they themselves glow.
71
Polar bear fur is not white, it's clear.
74
Gorillas can catch human colds and other illnesses.
205
7,000 new insect species are discovered every year.
30
Most elephants weigh less than a blue whale's tongue.
442
Cats make over 100 different vocal sounds; dogs can make about ten.
26
The most expensive cow in the world was sold in 2009 for $1.2 million.
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