"apes"

Ape teasing, like human joking behaviour, is provocative, persistent, and combines aspects of surprise and play

Given the size of apes and early humans, "downclimbing", considered trickier than climbing up, presented a significant physical challenge that their body structure would have responded through natural selection because of the risk of falls, the researchers said

In addition to killing for direct profit, poachers target animals to prevent them from destroying crops or attacking livestock.