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.
There are four different types of shark teeth. While sharksâ teeth do share the common traits described above, they have very different shapes and uses. There are four basic groups of shark diets and because of this there are four basic types of shark teeth.-Sharks that typically eat fish have long, narrow, needle-like teeth ideal for gripping something as slippery and streamlined as a fish.-Sharks that are benthic feeders, eating bivalves and crustaceans, have thick, plate-like teeth perfect for crushing the shells of their prey. sharkâs teeth are arranged in rows, the number of which varies from species to species. The row nearest the front of the mouth is the âworkingâ row of teeth (though some sharks use up to the first 8 rows of teeth), and they are the largest teeth in a sharksâ mouth.