Alien Life

  • The Drake Equation Revisited: Part I
    The NASA exobiology branch sponsored a public forum in Palo Alto, CA, on Tuesday, August 26, 2003, entitled, "The Drake Equation Revisited." The forum addressed the questions of estimating the probabilities for finding intelligent life in the universe. Here is the first in the series
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     O ramo de exobiologia da NASA patrocinou um fórum público em Palo Alto, Califórnia, EUA, na terça, 26 de agosto de 2003, intitulado “The Drake Equation Revisited” (“A Equação de Drake Revisitada”). O fórum apresentou as questões sobre a estimativa das probabilidades de se encontrar
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  • Terrestrial Tip of the Cap
    What makes a planet habitable has much to do with its compatibility with liquid water. Other than this range that might define a temperate climate, a second precondition for life is likely some change of seasons. Seasonal melting and freezing of water, in turn,
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  • Earth’s Radio-Wave Halo
    The Allen Telescope Array, planned for completion in the next few years, promises a robust and novel use of off-the-shelf radio dishes. Deployed in northern California, this dish array is one intriguing technology that Dr. Jilll Tarter describes.
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  • Stellar Countdown Yields Skymap
    In March, three Berkeley scientists set out to double-check the most promising signals found so far from the world's largest distributed computing project, SETI@Home. Following up on what is an equivalent of a million years of computation (or CPU units), their skymap of interesting
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  • Search for Life in the Universe II
    In this two-part essay, Director of the Hayden Planetarium, Neil deGrasse Tyson, reflects on the scientific and cultural implications of finding life elsewhere in the cosmos.
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  • Search for Life in the Universe I
    In this two-part essay, Director of the Hayden Planetarium, Neil deGrasse Tyson, reflects on the scientific and cultural implications of finding life elsewhere in the cosmos.
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  • Dirtside Simulation
    What would the future hold for a society where reputation was all that mattered? Astrobiology magazine reviews award-winning science-fiction from Cory Doctorow, Outreach Coordinator for the Electronic Frontier Foundation.
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  • Star Light, Star Bright…Any Oxygen Tonight?
    The possibility of complex life on other worlds may depend on green plant photosynthesis. But could this sunlight-dependent process evolve on worlds that orbit stars different from our sun?
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  • SETI@home’s Serendipity To-Do
    The idle processing power of millions of computers, turned to look for a stray signal from billions of stars, now has a target: 150 promising signals to be handled again in a new SETI@home project.
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    Depois da computação de mais de um milhão de anos de dados em mais de 4 milhões de computadores em todo o mundo, o SETI@home (SETI em casa), que processa dados em busca de sinais inteligentes do espaço, produziu uma lista de fontes de rádio
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  • What Does ET Look Like from 40 Light Years Away?
    The Terrestrial Planet Finder (TPF) mission will have the technology to look for signs of life in the light reflected or emitted by planets orbiting nearby stars. But nobody knows exactly what signals life would emit. Clues from studies of Earth's early atmosphere are guiding
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  • Anybody Out There? Part II
    Famed neurologist Oliver Sacks is the author of many books, including "The Man Who Mistook His Wife for a Hat" and "Uncle Tungsten". In this second of a two-part essay on astrobiology, Dr. Sacks muses on the possibility of life on other worlds.
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  • Anybody Out There? Part I
    Renowned neurologist Oliver Sacks is the author of many books, including "The Man Who Mistook His Wife for a Hat" and "Uncle Tungsten". In this first of a two-part essay on astrobiology, Dr. Sacks discusses his early fascination with the possibility of
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    Esperamos que alienígenas sejam muito mais espertos que nós. Não só eles possuirão a sabedoria de eras, mas viajarão a uma velocidade de empenamento, terão a habilidade de transformar (ou destruir) planetas inteiros e sua civilização se espalhará pelas galáxias.
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