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.
Unlike most other animals and fish, the inside of a shark's mouth has several rows of teeth lining the jaw. Depending on the species, they may have anywhere between 5 and 15 rows consisting of hundreds of teeth. Now, it's important to note that when a shark loses a tooth, the one behind it comes it to take its place. This process doesn't happen instantly, but it usually replaces it within 24-48 hours.