Extraordinary claims require extraordinary evidence. That truism, now known as the "Sagan standard" after science ...

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they ...

Warmer climates than Earth’s could accelerate life’s development, potentially increasing the number of planets with more ...

A Harvard professor questions whether research conducted at the University of Cambridge about life on K2-18b is accurate.

Many have claimed to see a UFO or have an encounter with an alien, but what do the scientists have to say? Here's what ...

By comparing those fingerprints to 20 different molecules that they would potentially expect to observe in the atmosphere, ...

Jake Taylor of the University of Oxford in the U.K., who studies atmospheres of exoplanets, used a basic statistical test to ...

Recently, a group of scientists claimed they found possible signs of life on a planet called K2-18b. The news made headlines.

Astronomers published evidence of possible biosignatures on the planet K2-18b earlier this month, but another look at the ...

Independent analysis raises doubts about alien life on exoplanet K2-18b Weak sulfur gas signals found in K2-18b data earlier ...

On Earth, DMS is made by ocean plankton, then quickly broken down in the atmosphere through photochemical and other reactions ...

Astronomers recently announced a tantalizing discovery: using the James Webb Space Telescope, researchers detected potential ...