What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth.

Scientist have concluded water did not arrive as early during Earth's formation as previously thought, an insight that bears directly on the question of when life originated on the planet. The finding ...

condensing and returning to the Earth as rain or snow. However, decades of destructive land use and water mismanagement have combined with climate change to put "unprecedented stress" on this ...

Drylands, characterized by an aridity index (AI) below 0.65, cover about 45% of the Earth's land and support more than 3 billion people. Severe water scarcity in these areas poses significant ...

The water cycle is the journey water takes as it moves from the land to the sky and back again. It follows a cycle of evaporation, condensation, precipitation and collection. The sun heats up ...

The study provides the first experimental demonstration of the potential impacts of climate change on water movement through grassland ecosystems, which make up nearly 40% of Earth's land area and ...

As pandemic lockdowns forced humans into isolation, Earth's vegetation was thriving. The year 2020 was the greenest in modern ...