In the Venus case, the potential clue was a faint spectral line in radio data, not a photograph of organisms in the clouds. One account of the controversy quotes Greaves describing the discovery as a ...

This year, the US Congress has heard testimonies from "UFO witnesses", providing more evidence than ever that alien intelligence may have attempted contact with Earth. But what are the pivotal moments ...

Long before the hunt began to find Earth lookalikes around other stars, one planet in the solar system had already been named Earth's twin. With its similar size and mass, Venus measures very close to ...