A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
A scorpion can hold its breath for up to 6 days.
19
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
Jellyfish as a species are actually older than dinosaurs and sharks.
383
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12