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.
The first reason there are so many fossilized teeth is that there are simply so many shark teeth, itâs bound to be one of the most common fossils. The reason for all those shark teeth is that sharks have multiple rows of teeth that are constantly being shed to maintain their razor sharp bite. EACH individual shark can shed more than 30,000 teeth in its lifetime.