Phys.orgEvidence of capuchin monkeys using tools 3000 years agoJun 25, 2019Bob YirkaBy Bob Yirkamore_vert
National GeographicOldest non-human stone tools outside Africa found in BrazilJun 24, 2019Michael GreshkoBy Michael Greshkomore_vert
Science News MagazineCapuchin monkeys' stone-tool use has evolved over 3,000 yearsJun 24, 2019Bruce BowerBy Bruce Bowermore_vert