Paleontology. 400-million-year-old wounds reveal a time when predators romped.
Stokstad
Erik
E
D000818:Animals; D005075:Biological Evolution; D004447:Echinodermata / Q000502:physiology*; D005399:Fishes; D005580:Fossils; D011235:Predatory Behavior; D012038:Regeneration