Aliens in Our Imagination: Friendly or Frightening? From the pointy ears of the Vulcans to the razor-sharp teeth of the ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got ...

K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually ...

What is the Kardashev Scale? Elon Musk sees it as a vision for humanity's future, but scientists say the reality is more ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals . Unexplained gases on other planets. Things mistaken for UFOs ...

Using emerging radio techniques refined during and after the Second World War, the astronomers detected a powerful radio ...

Research indicates airport radar systems may unintentionally broadcast Earth's presence to aliens up to 200 lightyears away, ...

In July 2025, astronomers spotted something remarkable passing through our Solar System, an object that had not come from anywhere nearby. Called 3I/ATLAS, it was travelling so fast and on such an ...

A new SETI study argues that turbulent space weather around distant stars can smear out ultra‑narrow alien radio signals, meaning technosignatures may already have reached Earth.

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...