If Earth had massive rings like Saturn, our sky, weather, tides, and even life could be dramatically different. Scientists explore how stunning—and strange—our world would become under shimmering ...

You might be able to see the so-called 'smiley face' if you're just at the right spot. But this facial feature will only have ...

The Poas volcano, one of Costa Rica's most popular tourist attractions, erupted again Wednesday after a sudden eruption Monday.