La Brea Tar Pits reopen to public after 20 years: Watch scientists excavate fossils The observation pit at La Brea Tar Pits has re-opened for the first time in 20 years. The location has 50,000 years of history. by James Maynard
Science Fossils from La Brea Tar Pits show climate change drove evolution of ice age predators by Jim Algar