The Big Bang of July. The Ordvician(Paleozoic Era) Trace fossils

It's not only the actual bodily remains of dead animals and plants that can become fossils. Things created or left behind by animals can also fossilise, such as their footprints, burrows and dung. These are known as trace fossils. They can often give clues as to the behaviour of the creature that made them, assuming it can be identified. Even non-living things can fossilise, such as the ripples on the seabed. On rare occasions, the remains of lightning strikes have been found - the sand fused into strange shapes by the energy of the lightning bolt.