Domestic pigs average a top speed of about 11 miles per hour.
182
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The octopus' testicles are located in its head.
82
The smallest known dinosaur is Compsognathus.
113
The world's oldest crow was 59 years old. Its name was Tataji.
215
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The lifespan of mammals is about 1 and a half billion heartbeats.
127
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12