The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
Female kangaroos have three vaginas.
2
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Sheep, goats, octopuses, and toads have rectangular pupils.
7