Cats recognise the voice of their owner, but never evolved to care.
22
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
A scorpion can hold its breath for up to 6 days.
19
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
The Basenji dog is the only dog that is not able to bark.
4