Does any animal eat sharks?

a polar bear can eat a shark, killer whale, etc. so yes

Though the great white is considered the top marine predator, orcas may actually rule the oceans, new observations suggest. Biologists in South Africa investigate the remains of great white sharks killed by orcas, a behavior rarely witnessed firsthand.

Explanation:

i'd say that the moon rock is about 2.2 billion years old.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.