Fossils are fascinating.
The Ediacara age was quite interesting since it was either the start, or the false start of the transition from microbes to multicellular criitters big enough to be seen with naked eye .
you're probably familiar with the Burgess Shale fossils of British Columbia Canada, from slightly later, are also quite significant and interesting because chronicle the actual start of multicellar animal life that replaced the edicaran fauna and led to us ( and to jellyfish, and earthworms, and insects, etc).