The scientists nicknamed one capuchin kidnapper Joker because the scar at the side of its mouth reminded them of the "Batman" villain.

On Jicarón Island, a lush patch of tropical forest floating off the coast of Panama, something strange is unfolding in the ...

Plus, researchers could hear adult howler monkeys calling back and forth with the infants, who would sometimes try to crawl away. Camera footage showed one occasion when an adult howler came and tried ...

That includes Roman Sionis, a.k.a. Black Mask, a connoisseur of death masks and leader of The Party Animals gang that has ... “That’s why the call him the Joker.” No longer is the Joker ...