When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what ...

Attosecond science, the laser-led study of what happens to matter over very short timescales, could lead to major advances in ...

When some of the biggest stars reach the end of their lives, they explode in spectacular supernovas and leave behind ...

So I grabbed my camera, ran outside, and looked up just as Mars was supposed to emerge from the Moon's curved horizon. Seen ...