Bake them, freeze them, fire them from a gun or blast them into space: tardigrades can survive almost anything. Some experts ...

Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the Earth. Floating around the atmosphere is a mixture of molecules – tiny ...

MORE IS known about the surface of Mars than the floor of the ocean. By one count America spends 150 times more on space exploration than ocean research. Scientists have mapped almost every Martian ...