A New History of Life

Amniotes—The Shape of Things to Come (1520x24)

Air date: Jan 01, 2013

Search for the origin of amniotes, which are egg-laying tetrapods, such as reptiles. Delve into the history of classification systems for life. The Linnaean system is based on resemblances between organisms. Learn why the more recent cladistic system, based on shared characteristics, implies that there is no such thing as a reptile.