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The Green Bank Telescope is one of the radio telescopes used by the Breakthrough Listen project to search for alien communications. Although most searches are focused on the biology of extraterrestrial life, an extraterrestrial intelligence capable enough to develop a civilization may be detectable by other means as well.
The extraterrestrial hypothesis (ETH) proposes that some unidentified flying objects (UFOs) are best explained as being physical spacecraft occupied by extraterrestrial intelligence or non-human aliens, or non-occupied alien probes from other planets visiting Earth. In spite of ardent believers that various UFO sightings are verifiable evidence ...
[83] 2013 research at NASA's Johnson Space Center, however, shows that faster-than-light travel with the Alcubierre drive requires dramatically less energy than previously thought, [85] needing only about 1 tonne of exotic mass-energy [86] to move a spacecraft at 10 times the speed of light, in contrast to previous estimates that stated that ...
The search for extraterrestrial intelligence (SETI) is a collective term for scientific searches for intelligent extraterrestrial life.Methods include monitoring electromagnetic radiation for signs of transmissions from civilizations on other planets, [1] [2] [3] optical observation, and the search for physical artifacts.
The alien-hunting Breakthrough Listen initiative is to turn a hi-tech radio telescope on more than a million stars near Earth using the MeerKAT radio telescope in South Africa.
Space colonization has been in a broad sense referred to as space settlement, space humanization or space habitation. [16] Space colonization in a narrow sense refers to space settlements, as envisioned by Gerard K. O'Neill. [17] It is characterized by elements such as: settlement and exploitation, [18] as well as territorial claim. [19]
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This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...