The evolution of life and landscapes happens over vast amounts of time. To understand the scale of time for these changes, we look for evidence in layers of rock. Events like volcanic eruptions, animal extinctions, sediment deposition and ice ages leave traces in layers of rock worldwide.
Submit your entry online to the National Geographic Photography Contest in any of these three categories: people, places, and nature. As a leader in capturing our world through brilliant imagery, National Geographic Magazine sets the standard for photographic excellence.
Researcher Jack Hogg has studied bighorn sheep for over 30 years. In that time, he has come to know the species like few other people ever will. Follow Jack on a delightful journey watch baby bighorn lambs at play, as he discusses what a changing climate might mean for the animals.
was a German biologist and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology, including anthropogeny, ecology, phylum, phylogeny, and the kingdom Protista.