Toronto, Dec 20: A research team has discovered the earliest evidence of our cave-dwelling human ancestors at the Wonderwerk Cave in South Africa.
The team was led by Professor Michael Chazan, director of the University of Toronto's Archaeology Centre in Canada.
Stone tools found at the bottom level of the cave, believed to be 2 million years old, show that human ancestors were in the cave earlier than ever thought before.
Geological evidence indicates that these tools were left in the cave and not washed into the site from the outside world.