Children are like a sponge ... The only mammal that cannot jump is an elephant. Human teeth are as tough as a shark’s teeth. Babies have a greater number of bones than adults.

Greenland sharks have narrow, pointed upper teeth and broader, squared teeth on the lower jaw. Holding large prey in position with their upper teeth, they roll their head in a circular motion ...

From great white sharks and megalodons to goblin sharks and sharks that glow in the dark, you'll find some new facts about ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.

Although mating has never been scientifically observed, scars on female sharks suggest that males use their teeth to hold onto while mating. Based on their estimated growth rate, length and number ...

Three children show and discuss their wobbly teeth. They visit an aquarium and find out about sharks’ teeth before talking about the differences between shark and human teeth. Students could be ...