Board Thread:General Discussion/@comment-25684889-20141218192818/@comment-995426-20141226074729

The Iconoclast: There...actually might have been. I might even have it somewhere in my collections. But I can't remember where.

But yes, all fossil fuels have a biological origin, though they are mineral and no longer tissue. However, after crude oil has been taken from the earth and refined into gasoline above ground, it can still grow bacteria after the fact, which can survive even inside fuel tanks. There's hardly a surface anywhere on the earth that isn't home to living microorganisms and DNA viruses of some kind.