Green oceans on early Earth, shaped by iron, pushed microbes to evolve light-absorbing tools that worked in green light.

The satellite was caught speeding through low Earth orbit, moving between three images that were taken seconds apart.

The mission, jointly operated by the United States and India, will measure minute changes to land, ice, and ecosystems around ...

The sun may rise every morning, but the amount of sunlight reaching Earth's surface can substantially vary over decades, ...

The study also provides a new approach to solving one of the biggest enduring scientific mysteries: when did plate tectonics begin?