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 Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
The seahorse is the only fish to have a neck.
12
The head of a jellyfish is called the "Bell."
6
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Only 3% of bird species have penises.
0