For many years, planetary scientists have believed that water-rich meteorites arriving late in Earth's history (OK, the time ...

It was long thought, up until recently, that asteroids and comets delivered Earth's oceans during the early Solar System.

Nasa researchers studying Apollo-era lunar soil discovered that meteorites from the Moon provided only a small fraction of ...

For centuries, people have wondered where Earth’s vast oceans came from. Our planet didn’t form with much water, yet today it’s covered in it. New research using powerful radio telescopes is bringing ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

For the Moon itself, the story is different. The Moon has far less water than Earth, but for such a dry world it’s important. Most of it lies frozen in dark polar craters, and these icy spots could ...