Hidden in Chile’s Atacama Desert, the $1.5B Extremely Large Telescope (ELT) nears completion. With a massive 130-ft mirror, ...

Now, the world is a cold, barren desert with few signs of liquid water ... planet when it arrived at Mars in 1971. About 4.5 billion years ago, Mars coalesced from the gaseous, dusty disk that ...

Far from being barren wastelands ... Yet more than one billion people, one-sixth of the Earth's population, actually live in desert regions. Deserts cover more than one-fifth of the Earth's ...

Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.