Paleontology. Life's innovations let it diversify, at least up to a point.
Kerr
Richard A
RA
D000818:Animals; D044822:Biodiversity; D005075:Biological Evolution; D016208:Databases, Factual; D005580:Fossils; D019015:Geologic Sediments; D007448:Invertebrates; D010163:Paleontology / Q000379:methods; D012623:Seawater; D015983:Selection Bias