Anna Eckhardt resigned from her position of family and consumer science teacher at Slippery Rock Middle School on July 9. With school starting in about two weeks, Eckhardt is concerned the school ...

Add Yahoo as a preferred source to see more of our stories on Google. An unassuming, brownish stone may be one of the most precious objects on Earth. The rare rock, called Teghaza 001, is a piece of ...

View the full episode transcript. San Francisco’s Beaver Street is just two blocks long. It climbs from Castro Street up a steep hill toward Corona Heights, a few blocks from the Castro Theater.

Roughly 2.5–2 billion years ago, Earth's surface experienced the biggest chemical change in its history when oxygen became ...

Elizabeth Cottrell went from collecting rocks as a child to becoming the steward of one of the world’s largest collections of rocks and ores. Here she is seen working in her laboratory at the National ...