> stamping eyes on one-third of a herd of 62 cattle. When the cattle returned each night, they took a head count to see how many had survived. Only three cows w

> stamping eyes on one-third of a herd of 62 cattle. When the cattle returned each night, they took a head count to see how many had survived. Only three cows were killed by lions during this period—all without the painted eyes on their rumps. And all the painted cows survived. This is really cool work! And fantastic that they are using a rigorous approach to study this. Getting more data will be important. I calculate a P value of 0.23, giving a pretty big possibility that they're finding results this extreme (0% of cattle lost from the eye group vs 7% of cattle lost from the no eye group) by chance.