When dragonflies mate, their tails form a love heart.
22
Cats sleep for 70% of their lives.
8
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
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Sharks, like other fish, have their reproductive organs in their chests.
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