Ancient weapon tips with traces of poison found in Saudi Arabia:.
"Archaeologists have discovered more than 5,500 stone objects in southern Saudi Arabia, including arrowheads with possible traces of plant poison. The finds may be the oldest evidence of the use of poisoned hunting weapons, but their exact age and the deliberate use of poison have not yet been proven.
The tools can be used to hunt large animals. Some tips preserve characteristic damages and microscopic traces of animal tissue. ".