Mercury is a planet of impossible contradictions. It’s scorching hot, yet we’ve found ice at its poles. It’s small and barren ...

With basic science and imagination, we can hypothesize what life might develop on other planets James Trefil and Michael Summers You are in a long, dark tunnel walled with solid ice. The only light ...

Composite image of the north pole of Mercury. Red are the areas of permanent shadow; yellow delineates radar bright deposits mapped from Earth. Data are plotted on a photomosaic of MESSENGER images.

What do many baked goods and the planet Mercury have in common? They shrink as they cool. Evidence suggests that since it formed about 4.5 billion years ago, Mercury has continuously contracted as it ...