A queen bee only uses her stinger to sting another queen bee.
An elephant’s gestation period can be up to 22 months.
A chameleon’s tongue is twice the length of its body.
To scare off enemies, the horned lizard squirts blood from its eyelids.
Spider silk, by weight, is stronger than steel.
A blue whale’s heart only beats nine times per minute.
A hedgehog’s heart beats 300 times per minute.
Horses can sleep standing up.
A cat needs four to five times more protein than a dog does.
When a baby kangaroo is born, it is about 0.8 in (2 cm) long.
In Roman times, mastiffs donned light armor and were sent after mounted knights.
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