During that time, it has created the most comprehensive map of the Martian atmosphere and its chemical composition, examined ...

The Search for Extraterrestrial Intelligence (SETI) focuses on finding technosignatures—potential signs of alien technology. If we look carefully, we might have a chance at detecting their ...

In what NASA described as “a milestone for interstellar observation” and everyone else described as “a blurry streak that looks like a Coke bottle fell over,” the Mars Perseverance rover has ...

Terraforming is the theoretical process of transforming a planet or moon to make it habitable for humans and other Earth-like ...

The earliest such attempts date to Nikola Tesla in 1899. Where, and how, are we listening today? What are we hoping to hear?

Recently, in a “wild” new spin on the theory, known as directed panspermia, it’s been suggested that “aliens sent microbes or ...

Interstellar comet 3I/ATLAS is just the third such object ever confirmed to have entered our solar system. It has attracted ...

Another, even rarer view is to see our planet from the surface of another world—something, in fact, that first occurred only in 2004, when NASA’s Spirit rover on Mars snapped an image of Earth in that ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...