Armadillos spend about 80% of their lives asleep.
The most poisonous snake in the world is Belcher's Sea Snake or the Faint-banded Sea Snake (Hydrophis belcheri).
Chameleons often have tongues longer than their bodies.
When the queen of a clownfish school dies, a male clownfish changes its gender to become female and takes her place.
The fungus Cordyceps is able to "mind-control" other insects like ants to climb plants and attach there to become its food.
Dolphins cannot stay long underwater because they breathe through their blowholes above water.
Some species of earthworm can have as many as 10 hearts.
The acceleration rate of a flea's jump is 20 times that of a space shuttle during launch.
The largest frog in the world is The Goliath Frog of Gabon in West Africa and can grow as big as 33cm long and up to 3kg heavy.
The Horseshoe crab has blue blood.
The lightest organ in the human body is the lung.
An ostrich egg is also the largest existing single cell.
The biggest egg in the world is the ostrich egg. It could take as many as 30 chicken eggs to equal its volume, and up to 2 hours to hard boil.
To avoid predators, a mother Slow Loris licks its offspring with poison before sending them off to search for food.
A kind of jellyfish (Turritopsis nutricula) upon reaching adulthood can transform itself back to childhood by converting its cells. It may repeat this to live forever.
The little Alaskan Wood Frog is capable of reviving itself back to normal life after staying completely frozen for months, during which its heart, brain and other organs stop functioning.