New research reveals mammals were abandoning trees millions of years before the asteroid hit changing everything we know ...

What was their great innovation? Botanists call flowering plants angiosperms, from the Greek words for "vessel" and "seed." Unlike conifers, which produce seeds in open cones, angiosperms enclose ...

known as angiosperms, creating more diverse habitats on the ground. "We also knew that tree-dwelling mammals struggled after the asteroid impact. What had not been documented was whether mammals ...