An unusual experiment suggests that painting eyes on rear （屁股）ends of cows may help protect them from large predators like lions.
They worked with the local farmers in the Okavango area. Over 2,000 cows on !
there were separated into three different groups. Large eyes were painted on the rear ends of one group of cows. The third got nothing.
The eyes worked very well. Of the 683 cows with eyes painted, none were killed in the four-year period. 15 of the 835cows without ''eyes'' were killed.
The scientists were surprised to learn that even Xs seemed to give the cows some protection. Only 4 of the 543 cows with Xs were killed. The film, putting spotlight on sibling relationship, tells the story between a teenage and her younger brother after their parents died in a car crash.
The results seem to show a simple way to protect cows from lions. For example, in the experiment, there were always cows without painted eyes. The scientists aren't sure whether the eyes would work so well if all of the cows had them.
Anyhow, the fanners are just hpy that someone is trying to help keep their cows safe.
A. Meanwhile, cows with nothing on their rear ends didn't do so well.
B. However, the scientists warn that the method may have weaknesses.
C. Still, for now, it seems like a cheap and easy way to protect cows in the area.
D. The second group got simple Xs.
E. Painting eyes is easy to learn and doesn't cost much.
F. The scientists tested their ideas in a fbur-ycar study.
