The elephant brain weighs about 6,000g.
274
The seahorse is the only fish to have a neck.
12
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2