It is possible to lead a cow upstairs but not downstairs, because cows knees can't bend properly to walk back down.
The North Atlantic gets 1 inch wider every year.
Mosquitoes like the scent of estrogen, hence, women get bitten by mosquitoes more often than men do.
The eyes of a giant squid can be up to 15 inches across the biggest in the world.
Cats can hear ultrasound.
The tongue of a blue whale weighs more than most elephants.
The largest eggs in the world are laid by a shark.
The average iceberg weighs 20,000,000 tons!
About 1000 Earths would fit inside Jupiter - and the Sun could hold about 1000 Jupiters.
The only nation whose name begins with an "A", but doesn't end in an "A" is Afghanistan.