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JetPunk is an online trivia and quizzing website. The service offers a variety of quizzes in different topics, such as geography, history, science, literature, and music. [2] [3] The site offers quizzes in a variety of languages, including but not limited to: English, French, Spanish, Dutch, Italian, German, Finnish, Portuguese, and Polish. [4]
[1] [2] [3] The Drake equation speculates about the existence of sapient life elsewhere in the universe. The science of extraterrestrial life is known as astrobiology . Speculation about the possibility of inhabited worlds beyond Earth dates back to antiquity.
The term "Earth-like world" is prominent, in that the assumption is made that any world where life could evolve would have certain similarities to Earth, such as temperature ranges and gravity sufficient for an atmosphere to exist. Asimov begins with the estimated number of stars in the galaxy, 300 billion. [1]
[2] The initial idea of a flat Earth covered by a celestial dome was soon discarded. Thales' student Anaximander proposed a full celestial sphere instead. He also noticed evidences of the curved surface of the world and proposed that the Earth was shaped like a cylinder.
Alien pathogens could decimate the human population, which would have no immunity to them, or they might use terrestrial livestock or plants as hosts, causing indirect harm to humans. [45] Invasive organisms brought by extraterrestrial civilizations could cause great ecological harm because of the terrestrial biosphere's lack of defenses ...
Extraterrestrials in fiction. Alien language in science fiction; Ancient astronauts in popular culture; List of fictional extraterrestrials. List of alien races in DC Comics
No such life has ever been verifiably observed to exist. [1] The question of whether other inhabited worlds might exist has been debated since ancient times. [ 2 ] The modern form of the concept emerged when the Copernican Revolution demonstrated that the Earth was a planet revolving around the Sun, and other planets were, conversely, other ...