Advances in imaging and machine learning In their previous work, Hong's team, led by Limei Xu at Peking University, made significant strides toward a technique for studying the surface structure of ...

Add Yahoo as a preferred source to see more of our stories on Google. New simulations show ice stays slippery in deep cold because its crystal structure breaks down under motion, not because it melts.

When you step onto an icy sidewalk or push off on skis, the surface can seem to vanish beneath you. For more than a century, scientists have debated why ice stays slippery, even well below freezing.