PARRAMATTA, AUSTRALIA—Excavations ahead of the construction of a new playground at a park in suburban Sydney uncovered Aboriginal spear barbs, back blades, and flakes left over from tool making. The site, once home to the Burramatta clan, is also thought to have been a spot where clans came together for trading. “It was important in that it was a great food area. They kept this land open with fire stick farming, because kangaroos liked open land,” archaeologist Jillian Comber told The Daily Telegraph. In all, more than 400 artifacts were recovered. To watch a video about the remarkable art of the Aborigines, go to "Aboriginal Rock Art."