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.
It is a prehistoric shark that lived (literally) a few billion years ago. It weighed about the same as three school buses. It jaw size was about three times as big as a gâ¦reat whites 0.o There are rumors going on that there is still one in the world... *** *** *** The megalodon shark (C. megalodon) did not lived billions of years ago. It appeared in the fossil registers about approximately 28 millions of years ago, during the late Oligocene, and the more recent fossil found is a tooth from the Calabrian stage of the Pleistocene epoch, only to 1.5 million years ago.