Recent research suggests that Velociraptor mongoliensis was a feathered dinosaur. A forelimb fossil discovered in Mongolia showed quill knobs like those found in many modern birds. These telltale ...

This is a three-part unit about the rainforest and the creatures that live in it. The first dance session focuses on the sloth and the leopard. We explore how the sloth loves to curl up asleep ...

Since the 1970s, populations of arthropods—a group of animals that includes exoskeleton-bearing critters such as insects, spiders, centipedes, and millipedes—in the Puerto Rican rainforest have ...