I have both of these teeth. The large one on the left is from a Megaladon, a shark that was 70 to 90 feet long and as big around as a Greyhound bus. The white tooth on the right is from a Great White Shark!
Sharks only kill 5 people a year. But humans kill 4 million sharks. They have been an apex predator in our oceans a for millions of years and by us invading their habitat have fatalities occurred (Great White Shark by George Probst)