Evolution. Stretching the reign of early animals.
Kerr
R A
RA
D000818:Animals; D005075:Biological Evolution; D002247:Carbon Isotopes; D005580:Fossils; D019015:Geologic Sediments; D007448:Invertebrates; D007554:Isotopes; D007854:Lead / Q000032:analysis; D010163:Paleontology; D012426:Russia; D012623:Seawater; D017640:Silicates; D015040:Zirconium
D002247:Carbon Isotopes; D007554:Isotopes; D017640:Silicates; D007854:Lead; C003784:zircon; D015040:Zirconium