The woolly rhinoceros kept more of its genetic diversity in temperate Eurasia than in the Ice Age north
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
Maternal-age effects did not accumulate across generations, but they took opposite paths in two rotifer strains
Birds add fresh greenery to their nests, but scientists still cannot explain why it helps their young
Sooty mangabeys bend the middle of their feet nearly as much as chimpanzees bend their ankles while climbing