Monkeys can make stone tools too

Stone flakes made by capuchin monkeys look remarkably similar to stone tools made by early humans 2-3 million years ago, raising questions about the archaeological record. Read more in this news story: http://www.nature.com/news/monkey-tools-raise-questions-over-human-archaeological-record-1.20816 Read the original research paper: http://www.nature.com/nature/journal/vaop/ncurrent/full/nature20112.html