When a star runs out of fuel, it sheds its outer layers of gas and, if it doesn't explode in a supernova, forms a glowing shell of ionized gas that expands into space. Shells like these are known as ...

Whether in the form of a football, a brand logo, or a keychain-ready miniaturization, different card shapes are battling the traditional ‘CR80′ or ‘ID1′ format for market share. Even watches, cell ...

One Kilobot is not very smart. Each quarter-sized bot scuffles along on three rigid legs and can communicate only with its neighbors. Yet by instructing more than 1,000 Kilobots to follow a few simple ...