"The key is in the fat molecules, or sterols. Animals make cholesterol, plants make sitosterols and fungi make fungal sterols. If you find fossilised cholestero

"The key is in the fat molecules, or sterols. Animals make cholesterol, plants make sitosterols and fungi make fungal sterols. If you find fossilised cholesterol, then it is a sure sign that what you have is an animal. This is exactly what Bobrovskiy and Brock found. An abundance of fossilised cholesterol shows that Dickinsonia is an early animal."