The woolly rhinoceros kept more of its genetic diversity in temperate Eurasia than in the Ice Age north
The same 1,5-diene can form either a bridged or fused bicyclic structure, depending on its nitrogen group
Archosauromorphs exploded into new species after the end-Permian extinction, then their speciation steadily slowed
Four 1-meter footprints from 66.5 million years ago may be the first trackway left by an adult T. rex
This half-billion-year-old Charnia frond was buried in a sediment flow instead of flattened on the seafloor