Using compressed helium, the gun shoots the microscopic gene-bearing balls into sweet potato leaves.

FORBES: Millions Served

The gun shoots the microscopic gene-bearing balls into sweet potato leaves.

FORBES: Millions Served

The chimps' diet consists of bananas, potato leaves, sweet potatoes, plantains, coconuts, palm nuts and other fruits and vegetables, in addition to rice balls fortified with powdered milk.

CNN: Chimps in need after U.S. organization withdraws care