Discover the meanings of different stones and crystals. Learn how gemstones symbolize energy, healing, protection, and ...

It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have been six to nine miles in length. On the other hand, on Feb. 15, 2013, an ...

The cool conditions which have allowed ice caps to form on Earth are rare events in the planet's history and require many ...