The dark red color and looming posture of this Octopus tetricus likely signals menace to another octopus nearby, say scientists who studied 186 octopus interactions in 52 hours of underwater video.
David Scheel/Current Biology
New York City called a travel ban on vehicles in Times Square and elsewhere during last weekend's storm, which broke snowfall records all along the Mid-Atlantic coast.
Yana Paskova/Getty Images
Loose-leaf green tea of the modern variety. Archaeologists have discovered ancient tea in the tomb of a Chinese emperor who died in 141 B.C. It's the oldest known physical evidence of tea. But scientists aren't sure if the emperor was drinking tea as we know it or using it as medicine.