Autonomous free-flying robots aboard the International Space Station (ISS) frequently lose their bearings. Without gravity to distinguish up from down, even precision sensors suffer from accumulating ...

Polarized light is one of the most powerful tools scientists have for peering inside matter, yet the way it twists, scatters ...

In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist ...

Association of paleopalynological data from the Nanxiong Basin, south China, and late Paleocene niche expansion in endemic Asian fossil mammals.