2-Minute Quiz

11%

Which of these animals is the loudest?

White bellbird

Pistol shrimp

Humpback whale

African bush elephant

Rats have an area in their midbrain that resembles a "laugh center," and it gets engaged when the animals play or are tickled.

Rats have an area in their midbrain that resembles a "laugh center," and it gets engaged when the animals play or are tickled.