“Monkey and Duck Quack Up!” by Jennifer Hamburg, illustrated by Edwin Fotheringham. Scholastic, 2015. $17.99. Vivacious Monkey wants to win a rhyming contest with his partner the laid-back ...

This is the moment a monkey performed an acrobatic takedown on a man who had chased away its mates with a brick. A video showed the man picking up stones and trying to hit the monkeys which were ...

Male Azara’s owl monkeys of Argentina are among the most faithful mates and best fathers in the world, according to a newly published study.