From the Past...

It's always exciting to find something that you thought you had lost forever. That is likely what happens when scientists come across living "fossils". Creatures that were thought to have been extinct for vast periods of time which suddenly appear on our doorstep, hardly changed from the last fossil record we have of them. In the ocean the possibility for such occurances is all the more possible because of the difficulty we have in exploring the ocean depths. From time to time these living "fossils" will surface for whatever reason, and we will get a glimpse of what seems to be a trip back in time. Two noteworthy examples are the Coelacanth (PBS link about it here) and the Frill Shark (youtube video here).