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
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Cats and dogs can hear ultrasound.
350
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8