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  2. Extraterrestrial life - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_life

    Popular belief in thriving alien civilisations elsewhere in the solar system still remained strong until Mariner 4 and Mariner 9 provided close images of Mars, which debunked forever the idea of the existence of Martians and decreased the previous expectations of finding alien life in general. [140]

  3. Extraterrestrial intelligence - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_intelligence

    The extraterrestrial hypothesis is the idea that some UFOs are vehicles containing or sent by extraterrestrial beings (usually called aliens in this context). [13] As an explanation for UFOs, ETI is sometimes contrasted with EDI (extradimensional intelligence), for example by J. Allen Hynek. [24]

  4. Time-traveler UFO hypothesis - Wikipedia

    en.wikipedia.org/wiki/Time-traveler_UFO_hypothesis

    Later, the dwarf-like alien scientist Dr. Z'ong reveals to Mortimer that commander Basam Damdu, absolute dictator of the Yellow Empire from The Secret of the Swordfish, along with his army, including Zong himself, are humans from 8061, a time when the earth is deserted due to a long nuclear war in the 21st century and humans are an endangered ...

  5. List of dates predicted for apocalyptic events - Wikipedia

    en.wikipedia.org/wiki/List_of_dates_predicted...

    According to the Century 10, Quatrain 74 of The Prophecies (1555), [199] the "start" of the end of the world begins in the given date of 3797, with a prolonged global war lasting between 25 to 29 years, followed by a series of smaller wars, [200] but most interpretations of Nostradamus dates are aware of required basic mathematic sums, given ...

  6. Timeline of the far future - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_far_future

    By this time, if protons do decay, the Black Hole Era, in which black holes are the only remaining celestial objects, begins. [9] [141] 3.14×10 50 (314 quindecillion) The estimated time until a micro black hole of one Earth mass today, will have decayed into subatomic particles by the emission of Hawking radiation. [147] 10 65 (100 vigintillion)

  7. Search for extraterrestrial intelligence - Wikipedia

    en.wikipedia.org/wiki/Search_for...

    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.

  8. Panspermia - Wikipedia

    en.wikipedia.org/wiki/Panspermia

    that organic molecules originated in space (perhaps to be distributed to Earth) [14] that life originated from these molecules, extraterrestrially [8] that this extraterrestrial life was transported to Earth. [19] The creation and distribution of organic molecules from space is now uncontroversial; it is known as pseudo-panspermia. The jump ...

  9. Drake equation - Wikipedia

    en.wikipedia.org/wiki/Drake_equation

    f c = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space. L = the length of time for which such civilizations release detectable signals into space. [6] [7] This form of the equation first appeared in Drake's 1965 paper. [8] [9]