Searching for alien signals sounds like a question of which star to aim a telescope at. It’s also a question of when to listen, because a civilization sending a focused radio beam toward Earth might ...

University of Washington researchers have published a 5-billion-year computational simulation of Earth without life, ...

Astronomers have catalogued more than 6,000 planets beyond our solar system. None has settled the question that matters: is ...

Everyone has probably looked up at the night sky and wondered, 'Is there someone out there somewhere in this universe?' It's ...

It’s a dizzyingly busy time for scientists searching for life on distant planets. To date, astronomers have cataloged more ...

According to a study performed by U.S. and Spanish astronomers, alien astronomers could "hypothetically" identify Earth as a planet orbiting the Sun and observe our planet with clouds and oceans-just ...

A new model simulates a rocky planet without life, giving astronomers a baseline to judge whether gases in an exoplanet's ...

What would our atmosphere look like if there were no life on Earth?

Habitable, Earth-like planets can form even after giant planets have barrelled through their birthplace on epic migrations towards their host stars, new computer simulations suggest. The finding ...

The green colour of Earth's forests is not accidental. Plants contain chlorophyll, a pigment that absorbs red and blue wavelengths of sunlight while reflecting green light. This process allows plants ...