Evolution on Earth over the course of a billion years.
2005-01-21
2009-11-16
1919-04-27
2014-05-20
2008-10-20
2013-11-17
2009-09-30
1981-12-14
1968-01-01
1978-10-30
1969-07-10
2006-03-24
1971-01-01
1968-09-02
2008-04-10
1970-03-21
1999-11-02
1995-10-11
1892-10-28
2008-07-06
