Hi there friends! A while back Pete Sadler and I did some work looking at the record of eukaryotic diversity in the first two periods of the Neoproterozoic Era. (that paper can be found here) To do those analyses I created a spreadsheet of all of the eukaryotic fossil occurrences from that interval that I…

We chatted about Snowball Earth, life, cats and baking. Here’s the link. 

Figure 1. Geologic Time Scale The Precambrian Eon (Figure 1: Geologic Time scale) is, by definition, all of time before the start of the Cambrian Period ~541 million years ago. The formation of the Earth occurred ~4.5 billion years ago and the oldest evidence of life is ~3.5 billion years old in layered structures from…

now, why is it here?