For Mr. Reid, the officially released videos are only a glimpse of what the public might learn about U. The American people deserve to be informed. The Pentagon has never made any assertion about what exactly is going on in the videos, recorded in late and early over the Pacific and off the East Coast. Their difficulty is hard and usually require an outfit or group of players to team up together. They first appeared in and each one of them has its' own lore. Sign In Don't have an account?
Start a Wiki. Contents [ show ]. Categories :. Cancel Save. Boss Streuner. Boss Lordakia. Boss Saimon. Boss Mordon. Boss Devolarium. Boss Sibelon. Boss Sibelonit. Boss Lordakium. Here's what the much-hyped news means. Puerto Rico's famous alien-hunting telescope called the Arecibo Observatory took massive damage after a cable snapped in the dead of night. Its findings may soon be released to the public. Ex-military investigators seek answers about where UFOs come from and what their intentions might be, in a History Channel documentary series.
A new calculation posits that there are 36 intelligent alien civilizations sharing the Milky Way with humanity today, but it relies on some big assumptions. Researchers using China's huge new FAST radio telescope are piecing together a technological strategy to carry out a major and sweeping search for extraterrestrial intelligence SETI.
T and Alien generating much interest among UFO hunters. Alien-hunting telescope scans 10 million stars for signs of life - and finds nothing Aliens. One is that the aliens are in a reproductive bind on their home world: They can no longer successfully procreate and so have come to Earth to use humans as incubators to spawn alien offspring.
The other is that the aliens are producing hybrid beings that will somehow help them take over our planet. Scientists, of course, are dubious of such claims. After all, there's never been any good evidence that the abductions are taking place. No one ever seems to bring along a cellphone to take photos or to pocket an artifact from the saucers. But an instructor at the University of Oxford in England believes the abductions are real. This finding suggests that complex organic molecules may form in stellar systems prior to the formation of planets, eventually arriving on young planets early in their formation.
Projects such as SETI are monitoring the galaxy for electromagnetic interstellar communications from civilizations on other worlds. The length of time required for a signal to travel across the vastness of space means that any signal detected would come from the distant past. Some astronomers search for extrasolar planets that may be conducive to life, narrowing the search to terrestrial planets within the habitable zone of their star. There is at least one planet on average per star.
The nearest known exoplanet is Proxima Centauri b , located 4. Almost all of the planets detected so far are within the Milky Way, but there have also been a few possible detections of extragalactic planets. The study of planetary habitability also considers a wide range of other factors in determining the suitability of a planet for hosting life. One sign that a planet probably already contains life is the presence of an atmosphere with significant amounts of oxygen , since that gas is highly reactive and generally would not last long without constant replenishment.
This replenishment occurs on Earth through photosynthetic organisms. One way to analyze the atmosphere of an exoplanet is through spectrography when it transits its star, though this might only be feasible with dim stars like white dwarfs. The science of astrobiology considers life on Earth as well, and in the broader astronomical context.
In , "remains of biotic life " were found in 4. In , University of California, Santa Cruz , astronomer and astrophysicist Frank Drake devised the Drake equation as a way to stimulate scientific dialogue at a meeting on the search for extraterrestrial intelligence SETI.
The equation is best understood not as an equation in the strictly mathematical sense, but to summarize all the various concepts which scientists must contemplate when considering the question of life elsewhere. Drake's proposed estimates are as follows, but numbers on the right side of the equation are agreed as speculative and open to substitution:. The Drake equation has proved controversial since several of its factors are uncertain and based on conjecture, not allowing conclusions to be made.
Based on observations from the Hubble Space Telescope , there are between and billion galaxies in the observable universe. Even if it is assumed that only one out of a billion of these stars has planets supporting life, there would be some 6. A study based on results from the Kepler spacecraft estimated that the Milky Way contains at least as many planets as it does stars, resulting in — billion exoplanets.
The apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations and the lack of evidence for such civilizations is known as the Fermi paradox. Cosmic pluralism, the plurality of worlds, or simply pluralism, describes the philosophical belief in numerous "worlds" in addition to Earth, which might harbor extraterrestrial life.
Before the development of the heliocentric theory and a recognition that the Sun is just one of many stars,  the notion of pluralism was largely mythological and philosophical. The earliest recorded assertion of extraterrestrial human life is found in ancient scriptures of Jainism. There are multiple "worlds" mentioned in Jain scriptures that support human life. There was a dramatic shift in thinking initiated by the invention of the telescope and the Copernican assault on geocentric cosmology.
Once it became clear that Earth was merely one planet amongst countless bodies in the universe, the theory of extraterrestrial life started to become a topic in the scientific community. The best known early-modern proponent of such ideas was the Italian philosopher Giordano Bruno , who argued in the 16th century for an infinite universe in which every star is surrounded by its own planetary system.
Bruno wrote that other worlds "have no less virtue nor a nature different to that of our earth" and, like Earth, "contain animals and inhabitants". In Baroque literature such as The Other World: The Societies and Governments of the Moon by Cyrano de Bergerac , extraterrestrial societies are presented as humoristic or ironic parodies of earthly society. Fontanelle 's "Conversations on the Plurality of Worlds" translated into English in offered similar excursions on the possibility of extraterrestrial life, expanding, rather than denying, the creative sphere of a Maker.
The possibility of extraterrestrials remained a widespread speculation as scientific discovery accelerated. William Herschel , the discoverer of Uranus , was one of many 18th—19th-century astronomers who believed that the Solar System is populated by alien life.
Other luminaries of the period who championed "cosmic pluralism" included Immanuel Kant and Benjamin Franklin.
At the height of the Enlightenment , even the Sun and Moon were considered candidates for extraterrestrial inhabitants. Speculation about life on Mars increased in the late 19th century, following telescopic observation of apparent Martian canals —which soon, however, turned out to be optical illusions. Wells to write the novel The War of the Worlds in , telling of an invasion by aliens from Mars who were fleeing the planet's desiccation. Spectroscopic analysis of Mars's atmosphere began in earnest in , when U.
The science fiction genre, although not so named during the time, developed during the late 19th century. Jules Verne 's Around the Moon features a discussion of the possibility of life on the Moon, but with the conclusion that it is barren.
Most unidentified flying objects or UFO sightings  can be readily explained as sightings of Earth-based aircraft, known astronomical objects , or as hoaxes. The possibility of extraterrestrial life on the Moon was ruled out in the s, and during the s it became clear that most of the other bodies of the Solar System do not harbor highly developed life, although the question of primitive life on bodies in the Solar System remains open.
The failure so far of the SETI program to detect an intelligent radio signal after decades of effort has at least partially dimmed the prevailing optimism of the beginning of the space age. Notwithstanding, belief in extraterrestrial beings continues to be voiced in pseudoscience , conspiracy theories, and in popular folklore , notably " Area 51 " and legends. It has become a pop culture trope given less-than-serious treatment in popular entertainment.
At the same time, the data returned by space probes, and giant strides in detection methods, have allowed science to begin delineating habitability criteria on other worlds, and to confirm that at least other planets are plentiful, though aliens remain a question mark. The Wow! Ward and Brownlee are open to the idea of evolution on other planets that is not based on essential Earth-like characteristics such as DNA and carbon.
Theoretical physicist Stephen Hawking in warned that humans should not try to contact alien life forms. He warned that aliens might pillage Earth for resources. In November , the White House released an official response to two petitions asking the U. According to the response, "The U.
In , the exoplanet Keplerf was discovered, along with Keplere and Keplerc. A related special issue of the journal Science , published earlier, described the discovery of the exoplanets.
On 17 April , the discovery of the Earth-size exoplanet Keplerf , light-years from Earth , was publicly announced;  it is the first Earth-size planet to be discovered in the habitable zone and it has been hypothesized that there may be liquid water on its surface. On 13 February , scientists including Geoffrey Marcy , Seth Shostak , Frank Drake and David Brin at a convention of the American Association for the Advancement of Science , discussed Active SETI and whether transmitting a message to possible intelligent extraterrestrials in the Cosmos was a good idea;   one result was a statement, signed by many, that a "worldwide scientific, political and humanitarian discussion must occur before any message is sent".
The group contracted the services of the meter Robert C. From Wikipedia, the free encyclopedia. For other articles using the term 'Life Beyond', see Life Beyond disambiguation. For other uses, see Astrobiology. Hypothetical life which may occur outside of Earth and which did not originate on Earth. Some major international efforts to search for extraterrestrial life.
Clockwise from top left : The search for extrasolar planets image: Kepler telescope Listening for extraterrestrial signals indicating intelligence image: Allen array Robotic exploration of the Solar System image: Curiosity rover on Mars. See also: Planetary habitability , Habitability of natural satellites , and Exobiology.
Main article: Life on Mercury. Main article: Life on Venus. Main article: Life on Mars. Main article: Life on Europa. Main article: Life on Titan. Main article: Extrasolar planets. See also: List of planetary systems. Main article: Drake equation. Main article: Cosmic pluralism. See also: Space exploration.A former U.S. Navy fighter pilot spoke this month about what he says was an encounter with a “Tic Tac”-shaped UFO and believes the flying object committed an “act of war.”.