Some people think not only is there life on other planets but that we’ve been visited by extraterrestrials. About half of Americans surveyed think so.

Life on Earth originated in the ocean, so it follows that this might be the case on other worlds. Now there is strong evidence that water once flowed freely on Mars, and Saturn’s moon Titan has ...

And in mid-2024, scientists identified five greenhouse gases that they said would be telltale signs of life on any other planet. But the journey of science is also about setbacks.

Claims about the detection of life on other planets go back decades. In the 1970s, one of the scientists working on the Viking mission to Mars claimed that his experiment had indicated there could ...

Most of us are reserving judgment on whether there is intelligent life on other planets; we haven’t even found bacteria yet, much less a race of aliens with Internet service and takeout food.

Although astronomers had suspected that there were other worlds around distant stars there had been no proof until that point. Since then, nearly 6,000 planets outside our solar system have been ...

Are there signs of life on alien planet K2-18b, or is it just a lot of hot air? April 16, 2025 7:02 PM ET. Heard on All Things Considered. Nell ... but there's no other way to put it." ...

This theory could give us insight into what life on other planets might look like. Ad Feedback. Health. Life, But ... There are a few variations of the Purple Earth hypothesis among scientists.

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

The James Webb Space Telescope may have detected life-associated gas in the atmosphere of a far-off planet. The news is being greeted with both enthusiasm and skepticism.

Claims about the detection of life on other planets go back decades. In the 1970s, ... In other words, there's about a 1 in 1,500 chance that this feature is not actually there.

Claims for the detection of life on other planets go back decades. In the 1970s, ... In other words, there’s about a 1 in 1,500 chance that this feature is not actually there.