New Scientist. "Scour Earth for traces of intelligent aliens": - уфология и палеоконтакт

Природа не терпит неточностей и не прощает ошибок.
Р. Эмерсон

ru en de fr pt es it zh ar nl sv

регистрация | войти на сайт | забыл пароль  

Видеоматериалы Аудиоматериалы Фотоматериалы Литература Личности Фальсификации Онлайн Ссылки

      На главную
      Прислать материал
      Машина времени
      Жизнь после смерти

Друзья: - самое лучшее в сети.

Мини-юбка.ru Фотографии красивых девушек в мини-юбках, шортах.

Canada's Worst Driver all seasons.
Худший водитель Канады, все сезоны.

Лучшее за месяц:

Искусственно созданное НЛО и дезинформация (77)
"Инцидент Баепенди": Встреча с инопланетянами 16 мая 1979 года (65)
Светлана Успенская: Символ тайных знаний Древнего Египта - изображение Имиут (51)
Раскрытие скрытого сокровища Австралии: "Круги фей" выделяют водород (49)
В парламенте Мексики представили две мумии инопланетян (48)
Хаттуса‏ ‎- ‎Невозможные ‎следы‏ ‎на‏ ‎руинах‏ ‎неизвестной ‎цивилизации (44)
"Выход в астрал" - непридуманная история (43)
Таинственное сопровождение: история поезда № 1702 (42)
Люди пришли на Землю из разных уголков Вселенной (40)
Черные дыры могут скрываться гораздо ближе к Земле, чем считалось ранее (39)

Последние комментарии:

Roger Penrose - The beauty and power of complex numbers and their role in the discovery of the twistor theory
АРХИВ ЛАИ: Кто на самом деле строил пирамиды - Дело о горах и Пирамидах
Береги космос!
BBC: Космос
Невероятный космос
Владимир Шемшук "Диалог Земля — Космос"
"Инцидент Баепенди": Встреча с инопланетянами 16 мая 1979 года
National Geographic - Alien Worlds
Звезда по имени МКС
А.Скляров "Цивилизация богов Древнего Египта"

Сейчас читают:

New Scientist. "Scour Earth for traces of intelligent aliens"
Через тернии...
National Geographic: Марсианские роботы
С новым 2013 годом!
Китай запустил свой первый луноход Чанъэ-3
Андрей Скляров - Артефакты возрастом в миллионы лет – аргументы против
Египет: Осирион в Абидосе
Вместо МКС лунная база
Никита Хрущёв - ракеты и космос
Иноходец. Урок Перельмана

TOP статей:

Антигравитационная платформа В.С.Гребенникова (3)
Воспоминания о будущем. Эрих фон Дэникен (2)
"Контакт" Роберта Земекиса (2)
А.Скляров "Цивилизация богов Древнего Египта" (2)
Фильм "Загадки Древнего Египта" (1)
В.А.Чернобров. Хронология и география активности НЛО (1)
Xeno Tactic (1)
Назад в будущее (1)
А.Скляров "О болгарских черепах" (1)
Roger Penrose - The beauty and power of complex numbers and their role in the discovery of the twistor theory (1)

В центре внимания:

Подводные нло, подводники, группа Дятлова, реальный контакт с тонким миром, Войнича, Коалиционный отряд Наблюдателей, Стивен Хокинг, пятибрат, путешествие по времени, алмистов, материалы ра, Аоум, украина, Индия, Антигравитационная плита, джон тайтер, Андрей Жуков, дневник джона тайтера, Скляров, карелии, уфология.

Карта сайта

New Scientist. "Scour Earth for traces of intelligent aliens"
Нет версии на русском языке

  Литература, Палеоконтакт

разместил в 19:32 werevirus  

0 0

Scour Earth for traces of intelligent aliens

If smart aliens exist, they may have visited Earth millions of years ago – and left signs of their technological prowess that should be cheap and easy for us to detect.

So says astrophysicist Paul Davies of Arizona State University in Tempe. Traditionally, the search for extraterrestrial intelligence (SETI) has focused on listening for deliberate dispatches in radio signals. But in 50 years of searching, this costly approach has drawn a blank.

So Davies suggests scouring our own planet, even our cells, on the off-chance that aliens visited and did what amounts to scrawling "We were here" on the walls. "We can answer the question 'Are we alone?' without picking up messages," he says. "We may see indirect evidence of alien technology based on the footprint it leaves."

If aliens did come to our cosmic neighbourhood, it was probably hundreds of millions of years ago. Any "footprints" would have to last for eons to be detected by us. That means a manufactured slab of rock in the style of 2001: A Space Odyssey (pictured) would be a poor candidate: it would erode, or at least get buried before we came to notice it.

But detritus from industry, such as mining, might last. Former mines on the Earth, the moon or asteroids could show up in geological surveys, even if they have filled in or eroded since the aliens left, says Davies.


Junk DNA

Nuclear waste is another possibility. Davies suggests we search for plutonium-244. The element occurs naturally on Earth in trace amounts only and has a half-life of 80 million years. So substantial deposits would be a sign of alien nuclear technology.

This echoes a suggestion by Frank Drake of the SETI Institute in California that aliens might have used radioactive materials to mark the location of a message.

Aliens may even have left deliberate messages in our DNA, Davies says. Most DNA includes long sequences that seem to serve no biological function. Aliens may have embedded code in this "junk DNA" – a sequence of prime numbers as in the movie Contact, say – to signal their existence to us.

Funny code

Microbiologist Steve Benner of the Foundation for Applied Molecular Evolution in Gainesville, Florida, reckons such a message would get deleted pretty quickly. "Paul is being a little too extravagant here," he says. "He overestimated the robustness of non-functional DNA."

Gary Ruvkun at Harvard Medical School, who heads the Search for Extraterrestrial Genomes project, agrees: "You'd need a funny code," he says, one that would still be decipherable even after it mutated.

In 1978, Japanese researchers searched the DNA of the bacteriophage Phi X174 for such signs and failed to find anything.

Plutonium phones

Davies's paper has garnered a spectrum of further responses. Drake thinks "being alert for artefacts of extraterrestrial origin, in space but particularly on Earth, is a good thing to do".

Seth Shostak, also at the SETI Institute, agrees, but emphasises that hunts on Earth can't be a substitute for searching beyond our planet. "After all," he says, "the Earth tends to obliterate evidence on its surface."

David Deutsch, a theoretical physicist at the University of Oxford, says searching on Earth is unlikely to be fruitful but is certainly worth doing: "This is something where we really should leave no stone unturned." He doubts that aliens used nuclear power to reach Earth – something more powerful like antimatter is more likely, he says – "but maybe they used plutonium for their mobile phones".

Free genomes

Biologist Norman Pace at the University of Colorado, Boulder, on the other hand, says the article is "mainly bullshit". "I do have faith that there is a lot of biology out in the universe, but I also believe in travel limitations implicit in the speed of light and the vastness of the universe."

Davies admits that his idea is "wild and fanciful", but adds that it has the benefit of being cheap. "It costs nothing to crawl through a database of genomes. This stuff is free on the internet," he says. "The chances are exceedingly small that anything will come out of it. Nevertheless, the pay-off is exceedingly big."

He wants more people to have a shot at doing SETI. "Instead of leaving it to a heroic band of radio astronomers, I want to say 'look, everyone can lend a hand'," he says. "We can make this whole field much larger, and involve everybody."

   New Scientist. "Scour Earth for traces of intelligent aliens" подробнее...

просмотров (8056) | комментариев (0)  

Добавить новый комментарий:

Ваше имя:

Код проверки:

Ваше сообщение:

Поисковые теги: - уфология и палеоконтакт с научной точки зрения. (c) 2011-2023 в каталоге теперь в каталоге DMOZ
Яндекс цитирования