The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets.

This water, now over 4.5 billion years old, has been perpetually renewed through Earth's water cycle. My research team has ...

Those on board, which include not only Williams and Wilmore, but also NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov, have a 17-hour trip back to Earth. They are expected to make ...

Water evaporates from ground level and rises into the atmosphere, spreading across the world as vapour before cooling, condensing and returning to the Earth as rain or snow. However, decades of ...

After a long space mission, Sunita Williams and Butch Wilmore will soon make a water landing back on Earth. Here's what to know about their return.