Two-dimensional materials are substances with a thickness of a few nanometres or less. Electrons in these materials are free to move in the two-dimensional plane, but their restricted motion in the ...

Are you a step counter, aiming for 10,000 steps per day to stay healthy? Many studies have suggested you don't need to hit that mark to maintain good health and live longer. And now the largest study ...

Welcome to Smithsonian Open Access, where you can download, share, and reuse millions of the Smithsonian’s images—right now, without asking. With new platforms and tools, you have easier access to ...