The word “planet” came from the ancient Greek words that mean “wandering star.” That makes sense, because for thousands of years, people have watched planets change position in the night sky — unlike ...

The ancient Greeks proved over 2,000 years ago that the Earth was round and figured out how big it was by using simple observations of the Sun. But how do people know this today? When you drop ...

Dr Rudi Kuhn does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

Add Yahoo as a preferred source to see more of our stories on Google. By Megan Rowling BARCELONA (Thomson Reuters Foundation) - Children must be given a direct role in making decisions on how to ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. NEW ORLEANS (WGNO) — Mercury, Venus, Mars, ...