1-sharks lived at the time of the dinosaurs
2-there are more than 500 species of sharks
3-very few species of sharks are dangerous to people (only 12 species of sharks are responsible for fatal human attacks)
4-sharks are found in every ocean in the world, even the Arctic Ocean.
5-Most sharks have 5 rows of teeth, and can have as many as 3000 teeth at once. They lose up to 100 per day.
-Thayne Andersen, I’m 7, almost 8 and I live in Sahuarita, Arizona (a few miles south of Tucson) in the USA.