Can aliens travel to Earth? Here's why physics makes interstellar flight nearly impossible

The Pentagon on 22 May 2026 released a second trove of once-classified images and video footage of unexplained flying objects ...

What could alien life look like? These Earthlings offer clues.

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for ...

Could aliens ever visit Earth? An aerospace scientist unpacks the challenges of ...

The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth.