Rare mega-shark teeth discovered at Australian beach

An enthusiast discovered sharp teeth on Australia's Jan Jug coast, leading to the identification of a prehistoric shark species that was twice the size of a great white. This predator lived 25 million years ago, preying on small whales and penguins. Due to the cartilage composition of shark skeletons, fossilization is rare, making the discovery of multiple teeth sets from a single shark a significant find.

Where were the sharp teeth discovered?

• On a beach in California

• On a boulder at Australia's Jan Jug coast

• In a forest in Brazil

• In a cave in South Africa

How does the size of the prehistoric shark compare to a great white?

• Half the size

• Three times the size

• Same size

• Twice the size

What did the prehistoric shark likely prey on?

• Sea lions and octopuses

• Dolphins and seals

• Large fish and turtles

• Small whales and penguins

Why is finding multiple sets of teeth from a single shark rare?

• Sharks only have one set of teeth

• Sharks rarely lose teeth

• Shark teeth dissolve in water

• Shark skeletons are mostly cartilage

What material are shark skeletons primarily made of?

• Silica

• Cartilage

• Bone

• Calcium