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

Where does water, a giver and taker of life on planet Earth, come from? When I was in junior high school, my science teacher taught us about the water cycle—evaporation from oceans and lakes ...

The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets. Four billion years ago, Earth was a lifeless world, but a dynamic one. Crashing waves ...

When teachers explain ocean tides, they frequently describe how the moon's gravity pulls on Earth and all of its water. This, they often say, leads to a gravitational imbalance, which stretches ...