The Chocolate Hills are 1,776 mounds on Bohol Island in the Philippines where grassy cover turns brown during the dry season.

"Black ice is a deadly driving hazard defined as patchy ice on roadways or other transportation surfaces that cannot easily be seen," the National Weather Service says. It is called black ice because, ...

In a paper published January 21 in Nature, a team led by scientists at the University of Wisconsin–Madison have run complex numerical simulations of plasma flows that, while leading to turbulence, ...