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crossref
2014-12-01T19:09:48Z
置信度 0.70
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Jill Tarter
2011-10-04T04:10:35Z
置信度 0.70
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Kathryn Denning
2024-09-07T20:46:30Z
置信度 0.70
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2026-06-13T00:25:41Z
置信度 0.70
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This video essay attempts an analytical account of how images of the Earth seen from an extraterrestrial viewpoint, that is to say, as an orbital panorama or as a whole disc, have been used within film.
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Anthony Patrickson
2024-03-12T18:42:25Z
置信度 0.70
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Rigorous peer-review is the corner-stone of high-quality academic publishing [...]
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2019-01-18T02:22:23Z
置信度 0.70
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The editors of Minerals would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2014:[...]
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Minerals Editorial Office
2015-01-08T11:29:32Z
置信度 0.70
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Arthur G. B. Metcalf
2011-10-04T04:10:35Z
置信度 0.70
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This chapter discusses what impact blindness would have on languages potentially used by a humanoid extraterrestrial species living on an Earth-like planet. The cultural biases surrounding blindness are examined and deconstructed to arrive at a list of the fac…
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Sheri Wells-Jensen
2023-07-07T15:19:34Z
置信度 0.70
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2026-06-13T00:25:41Z
置信度 0.70
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2013-02-13T03:00:05Z
置信度 0.70
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crossref
2020-01-17T17:56:20Z
置信度 0.70
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The general definition of climate change means a variation in the statistical properties of the climate system when considered for a long period of time, regardless of cause [1]. Sometimes, the term climate change can also be used to refer to the climate chang…
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2016-11-25T10:57:37Z
置信度 0.70
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H. L. ARMSTRONG
2005-08-02T11:39:23Z
置信度 0.70
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The lack of any radio signals or other astronomical evidence supportive of the existence of intelligent extraterrestrial life possessed of technology of sufficient sophistication to bring itself to our attention here on Earth is not, per se, evidence of an abs…
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Richard Michael Blaber
2023-12-24T00:02:32Z
置信度 0.70
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Linda Billings, Pamela Conrad, Janet Siefert
2024-09-07T20:46:30Z
置信度 0.70
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2006-09-05T08:21:50Z
置信度 0.70
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Monica M. Grady
2007-05-16T13:37:34Z
置信度 0.70
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David Schilter
2018-11-21T13:16:32Z
置信度 0.70
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Astronomers around the world are pointing their telescopes toward the heavens, searching for signs of intelligent life. If they make contact with an advanced alien civilization, how will humankind respond? In thinking about first contact, the contributors to t…
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2022-10-11T10:57:11Z
置信度 0.70
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2016-11-25T15:57:37Z
置信度 0.70
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Abstract Space colonization is almost exclusively approached from a scientific perspective discussing its technical feasibility. Although since 1967 (year of adoption of the Outer Space Treaty) human activities in outer space are regulated by international law…
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Raphaël Costa
2023-01-19T03:01:46Z
置信度 0.70
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Yuri Amelin
2014-10-02T02:11:24Z
置信度 0.70
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The search for intelligent life elsewhere in the universe has continued for decades without yielding any tangible results, as experts debate active versus passive approaches and the risks involved in sending signals of humans’ presence.
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J. W. Traphagan
2023-10-24T13:09:57Z
置信度 0.70
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H. J. Smith
2011-10-04T04:10:35Z
置信度 0.70
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Since its establishment, the Search for Extraterrestrial Intelligence (SETI) has focused mainly on radio emissions as technosignatures. The Surface Technosignatures: Searching for Signs of Artificial Patterning on Extraterrestrial Terrain project takes a diffe…
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Ana Henrique Salvan, Caleb Strom
2026-07-02T16:32:44Z
置信度 0.70
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Francis Lyall
2024-09-07T20:46:30Z
置信度 0.70
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Timothy Swindle
2014-10-02T02:11:24Z
置信度 0.70
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Abstract Since at least the beginning of recorded history, humans have looked up at the sky and wondered whether or not we are alone. Traditionally, we have consulted philosophers and religious figures for guidance in answering this question. In every age and …
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Jill Tarter
2003-10-30T20:19:50Z
置信度 0.70
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Direct interaction ‘face to face’ with extraterrestrial intelligence (ETI) is highly unlikely due to the asynchronous nature of interstellar communication and the improbability of immediate contact. However, this chapter carves out the circumstances of ‘interc…
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Heike Ortner
2023-07-07T15:19:34Z
置信度 0.70
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J. Rosinski
2008-04-06T23:07:30Z
置信度 0.70
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Victor R. Baker
2002-10-14T13:55:05Z
置信度 0.70
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There is a widespread and perhaps uncritically accepted assumption on the part of SETI researchers and popularizers that we could tell what an ETI might be trying to tell us. We raise difficulties for this assumption. If the assumption is abandoned, a lot foll…
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Neil W. Tennant
2005-07-22T18:01:52Z
置信度 0.70
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Michael D. Papagiannis
2011-10-04T04:10:35Z
置信度 0.70
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2024-01-30T05:12:35Z
置信度 0.70
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Venera Spacecraft landed on Venus and took some images of rocks of Venus. The thin, plate-like slabs of rock could be due to molten lava that cooled and cracked. The composition and texture of these rocks is similar to terrestrial basaltic lava. The weathering…
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Ömer Aydan
2019-12-06T13:46:14Z
置信度 0.70
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2021-04-26T17:07:53Z
置信度 0.70
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G. MUELLER
2014-08-14T16:19:19Z
置信度 0.70
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In 1974 a message was beamed towards the stars by the giant Arecibo telescope in Puerto Rico, a brief blast of radio waves designed to alert extraterrestrial civilisations to our existence. Of course, we don’t know if such civilisations really exist. For the p…
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Keith Cooper
2021-04-26T17:07:53Z
置信度 0.70
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Donald Rapp
2018-01-19T10:53:51Z
置信度 0.70
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crossref
2020-01-17T17:56:20Z
置信度 0.70
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The editors of Minerals would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2013. [...]
crossref
Minerals Editorial Office
2014-02-27T11:05:59Z
置信度 0.70
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2020-01-17T17:56:20Z
置信度 0.70
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crossref
Barrie W. Jones
2013-07-30T12:06:02Z
置信度 0.70
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John Matson
2010-05-19T21:11:27Z
置信度 0.70
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Michael D. Papagiannis
2011-10-04T04:10:35Z
置信度 0.70
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Several exoplanets have been discovered to date, and the next step is the search for extraterrestrial life. However, it is difficult to estimate the number of life-bearing exoplanets because our only template is based on life on Earth. In this paper, a new app…
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Kohji Tsumura
2020-07-21T05:09:22Z
置信度 0.70
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Stephen F. Mason
2002-07-26T08:37:12Z
置信度 0.70
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2024-11-20T21:00:32Z
置信度 0.70
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2025-01-07T17:27:55Z
置信度 0.70
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There are simple projects that the student/class can develop in a classroom setup. Two of these projects are • Radio and optical correlation of the Sun • Radio observations of Jupiter NOTE: Both solar and Jupiter observations are possible by using a single rec…
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2016-11-25T10:57:37Z
置信度 0.70
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Although the history of science fiction genre is usually considered to begin with Mary Shelley s Frankenstein , science fiction was for many years a male domain. In contrast to the literary mainstream, science fiction usually portrayed its female characters as…
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Eva Hauser
2020-12-22T03:17:15Z
置信度 0.70
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Leslie E. Orgel
2011-10-04T04:10:35Z
置信度 0.70
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Donald Rapp
2012-11-19T09:06:45Z
置信度 0.70
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crossref
Martin Rees
2025-08-25T16:08:37Z
置信度 0.70
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The initial flying saucer mythology that arose in the 1950s and 1960s is characterized by explicitly religious and mystical narratives that describe contact with extraterrestrial savior beings. These beliefs emerged in the Cold War era, in response to widespre…
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Daniel Wojcik
2022-01-23T10:04:27Z
置信度 0.70
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F. Drake
2005-03-23T19:55:28Z
置信度 0.70
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crossref
2014-12-01T19:09:48Z
置信度 0.70
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Dowda et al. have measured iron concentrations in cosmic spherules collected inAntarctica and Indian Ocean sediments to quantify extra-terrestrial fluxes of bioavailable iron to the global ocean.Atmospheric iron bioavailability has been given much attention in…
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Anonymous
2020-09-29T01:28:57Z
置信度 0.70
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Virgiliu Pop
2008-11-15T00:35:04Z
置信度 0.70
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crossref
2024-11-20T21:00:32Z
置信度 0.70
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Scientists have used the National Science Foundation’s very long baseline array (VLBA) [2] radio telescope system and NASA’s Cassini spacecraft to measure the position of Saturn and its family of moons to within about a mile … • VLA Reveals a Close Pair of Pot…
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2016-11-25T15:57:37Z
置信度 0.70
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Abstract These people have little in common, except this: Each is responding in his or her own way—with denial, with fantasy, or with scientific derring-do—to a revolution in human thought. A revolution that knocked us off our throne at the hub of a wheeling u…
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David Koerner, Simon LeVay
2023-11-05T07:53:11Z
置信度 0.70
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The English version of this paper can be found at <a href="http://ssrn.com/abstract=3294358">http://ssrn.com/abstract=3294358</a>. <br><br><b>German Abstract:</b> Die Beschäftigung mit außerirdischer Intelligenz ist ein para…
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Bernd Pröschold
2019-01-16T06:33:23Z
置信度 0.70
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GEOCHEMISTRY Graphite is a relatively rare mineral phase in meteorites. Some of the graphite found in some of the most primitive meteorites, the chondrites, originated from other stars. Semenenko et al. describe seven unusual graphite-bearing xenoliths found w…
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2004-02-12T21:08:18Z
置信度 0.70
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Mark E. Koltko-Rivera
2013-02-15T22:11:44Z
置信度 0.70
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The study of Prebiotic Chemistry, and the closely related study of Astrobiology, is ultimately the study of our own point(s) of origin. Aiming to answer the questions of how, when, and where did the building blocks of life—i.e. biologically relevant organic mo…
crossref
2023-09-25T10:02:23Z
置信度 0.70
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W.R. McCluney
2003-11-02T04:14:32Z
置信度 0.70
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Róbert Géczi
2022-08-17T23:53:39Z
置信度 0.70
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Diana G. Tumminia
2026-02-08T10:49:07Z
置信度 0.70
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2023-09-01T20:21:45Z
置信度 0.70
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crossref
2004-11-04T19:05:36Z
置信度 0.70
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2014-10-13T08:32:16Z
置信度 0.70
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James Chequers, Stephen Joseph, Debbie Diduca
2012-09-10T17:19:10Z
置信度 0.70
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Analysis of liquid samples often includes an initial sample preparation step in which components that are not of interest, or other interfering substances can be removed. Concentration of analytes in a smaller volume is also often important. For samples collec…
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Jerome Ferrance
2022-03-29T08:20:47Z
置信度 0.70
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2026-06-13T00:25:41Z
置信度 0.70
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crossref
2026-06-13T00:25:41Z
置信度 0.70
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M. R. Heinrich
2012-06-01T02:50:01Z
置信度 0.70
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crossref
2024-08-09T05:56:15Z
置信度 0.70
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Any strategy for investigating whether abiotic and/or biotic organic molecules are present on planetary bodies in the solar system should focus on compounds which are readily synthesized under plausible prebiotic conditions, play an essential role in biochemis…
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Jeffrey L. Bada, Luann Becker, Gene D. McDonald
2005-03-28T23:01:09Z
置信度 0.70
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George C. Messenger, Milton S. Ash
2011-08-26T15:35:38Z
置信度 0.70
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I wrote this poem in 1954 after contemplating the mysteries of outer space on a clear night. Now it is 1974 and mankind has accomplished what was once thought to be impossible-making voyages of exploration beyond the confines of the Earth. Today, when I gaze a…
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Albert Notarbartolo
2006-04-25T04:12:15Z
置信度 0.70
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Earth is continuously exposed to a variety of extraterrestrial objects, including comets, asteroids, meteoroids, meteors, fireballs, meteorites, and anthropogenic space debris.These cosmic visitors can have significant effects on the environment, ecosystems, a…
openalex
2026-02-25
置信度 0.72
Extraterrestrial lifeAstrobiologyBiodiversitySpace (punctuation)Environmental science
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2026-06-13T00:25:41Z
置信度 0.70
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F.D. DRAKE
2013-11-20T21:21:01Z
置信度 0.70
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ROBERT A. FREITAS
2004-11-17T23:26:53Z
置信度 0.70
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Alexander Dalgarno
2012-03-24T10:26:58Z
置信度 0.70
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The study of Mars was carried out in its different morphological units. There was presence of surface water in the geological past, which is recorded as fluvial geomorphological features on Mars. This chapter draws attention toward topographical depressions an…
crossref
2022-12-23T22:11:16Z
置信度 0.70
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Abstract Since the dawn of our species, an unquenchable curiosity has driven us to ask and re-ask the same questions: Who are we? Where do we come from? Are we alone? Myths offered the first answers: myths of creation and of spirit worlds. From here, one trail…
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David Koerner, Simon LeVay
2023-11-05T07:53:11Z
置信度 0.70
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The anthropological study of extraterrestrial settings might seem novel and exotic. However, this chapter proposes that the methodological tool kit available to social scientists for the empirical study of multi-sited, distributed, and space-age research conte…
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Victor Buchli
2020-10-26T06:16:25Z
置信度 0.70
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crossref
2021-04-26T17:07:53Z
置信度 0.70
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Abstract The vast resources of space suggest a post-scarcity age ahead. Most people will then live in space cities necessarily designed in ways that also promote freedom. Space cities cannot have full autarky or independence because they must import raw materi…
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Martin Elvis
2023-01-19T03:01:46Z
置信度 0.70
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The stability of the solar system is a subject of much interest in the field of astronomy. Although the planets have been stable historically and will be in the short term, their weak gravitational effects on one another can be added up to some extent in unpre…
crossref
2016-11-25T10:57:37Z
置信度 0.70
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J. Woods Halley
2012-01-03T11:39:44Z
置信度 0.70
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2026-06-13T00:25:41Z
置信度 0.70
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crossref
2026-06-13T00:25:41Z
置信度 0.70
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The work of Miller and Urey encouraged the belief that life could be formed easily in many places in the Universe. Yet Darwinian evolution casts doubt on how many times primitive life may evolve to intelligent life. These arguments are reviewed and then supple…
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David Wilkinson
2013-10-01T15:49:15Z
置信度 0.70
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2014-12-01T19:09:48Z
置信度 0.70
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crossref
2024-11-20T21:00:32Z
置信度 0.70
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Despite all of the different modalities used for communication by animals on Earth – visual, acoustic, olfactory, etc. – only one instance of language has arisen in almost four billion years of evolution. Can we draw any conclusions from this single observatio…
crossref
Arik Kershenbaum
2023-07-07T15:19:34Z
置信度 0.70