An alarming message about deodorant use and breast cancer began circulating on the Internet in the 1990s, spread via e-mail and message-board postings. It continues to resurface now and again and causes a great deal of concern about the safety of items many of us use every day. So let's take a look at the evidence.
How long have sharks been in existence? A: Geological records show that modern shark species have existed for between 201 million and 174 million years. Earlier fish species similar to sharks existed as early as between 419 million and 359 million years ago.
Supershark lived before the age of the dinosaurs, which emerged about 230 million years ago. Until now, the oldest giant shark was found in rocks dating to 130 million years ago. [8 Weird Things About Sharks]