This is a fact.
There are hundreds of thousands of other facts, some better, some not so good. There are the data from genetics and lots of other fields. Those are facts. There are the dates, from a variety of disciplines. The list of facts is quite long. But this is one of my favorites. We had a nice cast in the bone lab when I was in grad school, and I spent a lot of time with her. (Now an x-ray suggests she is a he. Sigh!)
Happy now?
Site: Sterkfontein Cave, South Africa (1)
Discovered By: R. Broom & J. Robinson 1947 (1)
Estimated Age of Fossil: 2.5 mya * determined by Stratigraphic, floral & faunal data (1, 4)
Species Name: Australopithecus africanus (1, 2)
Gender: Male (based on CAT scan of wisdom teeth roots) (1, 30) Female (original interpretation) (4)
Cranial Capacity: 485 cc (2, 4)
Information: No tools found in same layer (4)
Interpretation: Erect posture (based on forward facing foramen magnum) (8)
Nickname: Mrs. Ples (1)
See original source for notes:
http://www.mos.org/evolution/fossils/fossilview.php?fid=24