These Prehistoric Turtles Died While Having Sex

Man, the crap you find on the internet.

Some 47 million years ago, these turtles clung to each other as they mated in a German lake. Now fossilised, the members of this species are the only known examples of vertebrates fossilised during copulation. 

What killed the turtles, leaving them in this eternal embrace? Joyce thinks that the volcanic activity beneath the lake meant that poisonous gases like carbon dioxide seeped up though the lake bed, turning the bottom of the lake into a toxic bath.

 47 million years years old?  Way to old to be having sex!