While hibernating, frogs breathe through their skin.
95% of all the animal species on the earth are insects.
When glass breaks, the cracks can move at speeds of more than 3,000 miles per hour.
An ant can lift things 10 times its own weight, and ants do not sleep.
In total there is said to be around 400 million dogs in the world.
The deepest surface point on Mars is Hellas, about 3 km deep.
Remarkably, frogs actually use their eyes to help them swallow food. When the frog blinks, its eyeballs are pushed downwards creating a bulge in the roof of its mouth. This bulge squeezes the food inside the frog's mouth down the back of its throat.
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
Many whales are toothless. They use a plate of comb-like fiber called baleen to filter small crustaceans and other creatures from the water
When glass breaks, the cracks move at speeds of more than 4,500 km/h (3,000 miles).