Cientistas falam como seria nosso encontro com alienígenas – Estariam nos preparando?

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encontro com alienígenas

Um novo livro afirma que o encontro com alienígenas seria muito mais benigno do que mostrado nos filmes; “A Chegada”, acima, é muito mais realista do que a maioria dos filmes. (Cortesia Paramount Pictures e Hybride Technologies)

Quando os marcianos pousaram na Terra no filme comédia de 1996, “Marte Ataca!”, por um momento parecia que tudo iria ficar bem. “Viemos em paz”, disse o líder deles, enquanto a música subia de volume e uma pomba voava acima.  Segundos mais tarde, o marciano sacou uma pistola laser e abriu fogo contra a multidão de humanos que assistia.  E mais uma invasão alienígena começava.

Isso é Hollywood, é claro. Mas o melodrama salienta um dos maiores medos da humanidade: Se e quando encontrarmos seres extraterrestre, eles irão gerar todos os tipos de devastação, bem como fazem nos filmes.

Mas será que irão mesmo?  Para seu novo livro, “Aliens: The World’s Leading Scientists on the Search for Extraterrestrial Life” (tradução livre: “Alienígenas, Os Principais Cientistas do Mundo Falam Sobre a Procura Por Vida Extraterrestre”), o físico quântico Jim Al-Khalili pediu à uma série de especialistas para explorarem como os humanos realmente fariam contato com alienígenas. A possibilidade não é tão absurda como uma vez pareceu: Desde que a NASA lançou sua missão Kepler em 2009, pesquisadores já descobriram milhares de novos planetas e “revolucionaram nosso conceito de quantos mundos habitáveis poderiam existir”, escreve a astrobióloga Nathalie Cabrol, em um de seus livros. Mas, embora Hollywood sugira que deveríamos esperar guerras contra os alienígenas, a ciência conta uma história completamente diferente.  Aqui estão quatro mitos populares sobre alienígenas que os cientistas desbancam:

Mito Nº1: Alienígenas nos comeriam

Filmes como A Bolha e Criaturas imaginam alienígenas colhendo os humanos como alimentos, uma perspectiva não muito prazerosa. Mas isto não bate com a ciência da nutrição, escreve o astrobiólogo Lewis Dartnell. Para que alienígenas obtivessem nutrição ao comer-nos, seus corpos deveriam ser capazes de processar nossas moléculas (tais como aminoácidos e açúcares).  E isso requer que tenham uma bioquímica similar – o que é muito difícil para espécies que vêm de um mundo diferente.

Mito Nº2: Alienígenas iriam cruzar conosco

Ambos ‘blockbusters‘ desta temporada, Aliens: Covenant e Guardiões da Galáxia Vol. 2, envolvem híbridos humanos-alienígenas. Mas dado o fato de que nem mesmo podemos reproduzir com o nosso parente evolucionário mais próximo, o chimpanzé, é “preponderantemente improvável” que possamos fazer isto com alienígenas, de acordo com Dartnell.

Mito Nº 3: Alienígenas se pareceriam conosco

A evolução humana depende de tantos fatores imprevisíveis e únicos, que é quase impossível que uma espécie alienígena tivesse características humanas, como os alienígenas dos filmes O Dia em que a Terra Parou, e Jornada nas Estrelas.  É muito mais provável, escreve o neurocietista Anil Seth, que eles seriam tão diferentes quanto um polvo, “nosso próprio alienígena terrestre”, que tem um algo nível de inteligência, um sistema nervoso descentralizado e uma estilo alternativo de consciência.

Mito Nº4: Alienígenas seriam criatura “vivas”

Mesmo filmes contidos, como “A Chegada”, erraram, de acordo com cientistas.  Se os alienígenas entrassem em contato conosco, acredita o cosmologista Martin Rees, não receberíamos mensagens de criaturas vivas, mas de robôs que eles produziram, que podem, em tese, viver para sempre.

Mito Nº 5: Os alienígenas roubariam nossa água e metais

Os alienígenas do “Dia da Independência” chegam na Terra para saquear seus recursos. Mas, novamente, a lógica não bate, escreve Dartnell. A maioria do nosso metal está no núcleo da Terra, não em sua crosta.  Asteroides seriam alvos muito melhores para mineração. E luas geladas, como a lua Europa de Júpiter, seriam lugares mais fáceis de estocar água. Elas são inabitadas, e não possuem um campo gravitacional forte como a Terra.

Então, se os alienígenas estão interessados em colher nossos corpos ou nossas terras, por que eles fariam contato? Dartnell suspetia de um motivo mais puro: Curiosidade. Ele escreve:

Se os alienígenas viessem para a Terra, seria na forma de pesquisadores: biólogos, antropologistas, linguistas, ávidos para compreenderem a peculiaridade dos trabalhos da vida na Terra, para conhecer a humanidade e aprender sobre nossa arte, música, cultura, linguagens, filosofias e religiões.”

Se eles vierem, é melhor esconder os nossos filmes sobre alienígenas.

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Fonte

Extraído de OvniHoje

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