Alpha Centauri sits more than four light-years away, close enough to fascinate generations of dreamers and far enough to make ...

Scientists have made the first experimental observation of matter wave diffraction in a short-lived electron-positron atom.

Some questions, like 'What's the meaning of life?', are difficult to answer because they're, well, difficult. However, there's also the other end of the spectrum. I'm talking about questions that are ...