When the keepers at the Netherlands' Emmen Zoo opened the night enclosure for 112 baboons on July 29, they expected the animals would be, as usual, eager to get inside.
After all, the baboons knew there was food for them in there.
Instead, biologist and zoo press officer Wijbren Landman tells All Things Considered the baboons didn't want to budge. "It took us about an hour to get them inside," he says. That night, the baboons didn't eat.