At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...

New method reveals chemical signs of early microbial life in ancient Earth rocks, showing photosynthesis evolved much earlier ...

Hints of life may have just flickered into view from a world 124 light-years away, and the signal is coming through the James ...

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

The new findings strengthen the "RNA world" hypothesis that describes how the first life on Earth could have used RNA instead ...

Recent research reveals microplastics are flooding the world’s oceans, diminishing their ability to absorb carbon dioxide, an ...

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

How did life begin on Earth? While scientists have theories, they don’t yet fully understand the precise chemical steps that ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: All life on Earth can be traced back to a Last ...

How life begins remains an unsolved question. One key component might be RNA, a molecular cousin of DNA found in every form of life on Earth, and now scientists say they have shown how it could have ...

Retired astronaut and current Sen. Mark Kelly (D-Ariz.) celebrated NASA’s “pretty exciting” announcement on Thursday after the space agency highlighted how scientists found sugars essential for life ...