Imagine you were an editor, and two stories came across your desk. One shows that chimpanzees use spears, giving insight into the origins of weaponmaking and violence in human society.
The other article shows that spider monkeys hug to avoid fights:
Hugging diffuses the tension when two bands of monkeys meet, say the British researchers who made the discovery. Without these calming embraces, the situation can escalate into aggression and even physical attacks, they report.
The researchers studied wild spider monkeys (Ateles geoffroyi), which live in the forests of Central and South America. These monkeys live in large groups, but split into short-lived, constantly changing groups of a few individuals to travel more easily in search of food.
The hugs seem to be ways of signaling friendship and avoiding conflict before it erupts.
Most editors and bloggers ran the first story, but the second is more unexpected in my opinion. Which would you highlight, and why?