This water, now over 4.5 billion years old, has been perpetually renewed through Earth's water cycle. My research team has recently proposed a new theory to explain how water first arrived on Earth.

Fog is a cheap and abundant source of fresh water, especially in remote dry regions ... But what it does get in abundance, and for six months of the year, is dense fog sweeping in from the ...

Managing menstruation in space is a topic that has evolved alongside women's increasing participation in space missions.