If you liked this story, share it with other people. Following a deadly yellow fever outbreak in 2016, brown howler monkeys are slowly making a recovery through targeted vaccination and reintroduction ...

This is Scientific American’s 60-Second Science. I’m Jeff DelViscio. Today: the final episode in our three-part sound escape to the Amazon rain forest. In today’s episode, we’re going into the trees.

Why are monkeys smart? Some say it is because they make mental maps for efficiently travelling through the forest canopy from one fruiting tree to the next. Kevin McLean, former fellow at the ...