Earth's craters are enduring testaments to direct asteroid hits. And though millionsâin some cases billionsâof years of erosion have made it difficult to determine the exact size of the meteorites, there is a general scientific consensus around the world's largest craters, which mark the largest asteroid impacts. Here are the ten biggest known: 1. Vredefort Crater.
Quick Answer. Tiger sharks have a row of 24 teeth in their upper jaw and a matching set of 24 teeth in the lower jaw, totaling 48 teeth. Tiger sharks have a square jaw structure, and each of their teeth are built with cutting and sawing mechanisms. Continue Reading.
1. Shark teeth are not attached to gums on a root like our teeth. 2. Sharks typically lose at least one tooth per week. 3. Sharks lose their teeth because they may become stuck in prey or broken and forced out. 4. Shark teeth are arranged in neat conveyor belt rows and can be replaced within a day of losing one. 5.