Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas unlike ...

A European-Japanese space mission will reach Mercury in 2026, carrying instruments designed to answer a question that has quietly unsettled planetary science for decades: how does a planet like this ...

Add Yahoo as a preferred source to see more of our stories on Google. An image of Mercury made with Blender with data from NASA and the USGS (Wikideas1) It’s a world where the Sun stops in the sky at ...