Are your old pennies worth a lot? Experts say some wheat pennies could be worth big bucks; here's where to find out.

"Are we alone?" This ancient question has occupied humanity's mind for a long time. In 1995, the discovery of the first ...

Called Kepler-725c, the faraway world has 10 times the mass of Earth, according to experts at the Chinese Academy of Sciences ...

Based on the Transit Timing Variation (TTV) technique for the first time, the super-Earth, Kepler-725c, with 10 times the ...