World's oldest meal: Ediacara animals 'ate algae and even had sophisticated guts'

Traces of the last suppers of some of the world's earliest known animals have been discovered in their 558-million-year-old fossils.

In the moments before the animals were entombed forever, they grazed on green algal slime on the shallow sea floor, according to an analysis of different types of molecules known as sterols, which were preserved in the fossils.