Aliens

  • The tech we’re going to need to detect ET

    A meeting of astrobiologists results in a target list of developments needed in the next two deca...

    Move over Mars rovers, new technologies to detect alien life are on the horizon. A group of scientists from around th...

    Space November 8, 2018
  • How to recognise an alien spaceship

    If someone visited the solar system, how would we detect it?

    In October 2017 the first interstellar visitor ever spotted by human astronomers passed through our solar system. It ...

    Space December 11, 2017
  • If aliens are out there, they’re staying awfully quiet

    The first tranche of a major search for ET concludes intelligent life doesn’t exist anywhere in 1...

    The first comprehensive search for radio signals produced by extraterrestrial civilisations has drawn a blank. As far...

    Space November 9, 2017
  • Top five places to look for extraterrestrial life

    It’s a mighty big universe, but ET hunters are zeroing in on these prime candidates, reports Andr...

    For all the hope and expectation, it is sobering to recall that, despite the best efforts of scientists and engineers...

    Space July 19, 2017
  • Alien megastructure 'discovery': a review of the facts

    Two recent stories suggest extraterrestrial life is alive and well – and advanced enough to build...

    An artist's impression of a Dyson sphere – a collection of energy-harvesting components built around a sun by an alie...

    Space August 31, 2016
  • Giant lasers could cloak Earth from alien eyes

    While we actively search for signs of life on other planets, who says ET isn't doing the same...

    To render Earth invisible to extraterrestrial eyes, powerful lasers may do the trick, say astronomers from Columbia U...

    Space April 4, 2016
  • From the vault: Alien encounters

    Cosmos takes a look back at some of our most popular articles. We'd love to hear from you abo...

    Getty Images We humans are no strangers to the idea of strangers in space. And with more and more exoplanet...

    Space August 3, 2015
  • From the vault: A trio of trailblazers

    Cosmos takes a look back at some of our most popular articles.

    This week, Cosmos tips its hat to some VIPs of science and their influential work. Silent witness It takes unflinchin...

    Society April 6, 2015
  • Searching for aliens through history

    Far from being a product of the UFO craze, the desire to contact intelligent life dates back to A...

    Message in a wave: The Arecibo Observatory in Puerto Rico is the world's largest single-dish radio telescope and most...

    Space February 4, 2009
  • Why go to space?

    Stephen Hawking makes the case for exploring beyond the bounds of our planet.

    “The Moon and Mars are the most suitable sites for space colonies in the Solar System.”Science Photo LibraryWhy shoul...

    Space February 1, 2009
  • Laser test finds no evidence of alien megastructure around weird star

    New research dampens hopes that light fluctuations from Boyajian’s Star were caused by extraterre...

    In a blow to ET-hunting hopefuls, a large team of astronomers using multi-layer analyses of high-resolution data gath...

    Space February 27, 2001
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