Hunting with poison arrows has been pushed back to 60,000 years ago, according to a Live Science report. Sven Isaksson of Stockholm University and his colleagues detected traces of poison in residues on five quartz arrowheads recovered from South Africa’s Umhlatuzana rock shelter, which was excavated in 1985. The toxin, called buphandrine, would have weakened prey, thus reducing the length of time and amount of energy expended on the hunt. The toxin epibuphanisine was detected on just one of the arrowheads, but both toxins had probably been applied to all of the weapons, Isaksson said. They may have even been...