- ...that fossil Thelodont fish (depiction pictured) surprised scientists by showing that stomachs evolved before jaws?
- ... that the extinct bivalve subfamily Praenuculinae can be told apart from its sister subfamily by looking at teeth?
- ... that Arthropleuridea is an extinct class of myriapods which includes, at over 2 meters long, the largest terrestrial arthropods that ever lived?
- ...that ostracoderms are the earliest known vertebrate animals?