When the remnants of two stars collide, the can create a black hole and dazzling jet. A new computer simulation reveals how the merger works.

A DNA deletion on the X chromosome causes pigment cells to produce the orange color.

A carnivorous caterpillar discovered on the Hawaiian island of Oahu adorns its silken protective case with the body parts of insect prey. This macabre coat helps them hide from spiders, whose webs make up the caterpillars’ hunting grounds. Bone collector caterpillars are also cannibals and will eat their fellow species!

The ancient people of Chaco Canyon may have hauled logs with head straps to build massive stone houses. So, two scientists gave it a try.