Existence of life on other planets – ElTiempo.com

Life on other planets could be only microbial and may quickly extinguished, as astrobiologists from the Research School of Earth Sciences of the National University of Australia.

In an investigation that aimed to understand how it could arise life, scientists realized that life on other planets would be easily extinguishing due to the extreme temperatures of the nascent planets.

“ The universe is probably full of habitable planets, so many scientists think that should be full of life ” says Aditya Chopra, author of the article published in the journal Astrobiology. “

” The first years are difficult, so we think (the types of life) rarely evolve fast enough to survive, “he said.

“The most primitive planetary environments are unstable. To produce a habitable planet, life forms require a number of factors like greenhouse gases regulated water and carbon dioxide to maintain stable surface temperatures “explains the scientist.

some four billion years ago, Earth, Venus and Mars were habitable. However, roughly a billion years after its formation, Venus became a greenhouse and Mars frozen in a freezer, the study found.

If there was microbial life at some point in Venus and Mars, failed to adapt to the rapidly changing environment said Charley Lineweaver, author of the paper. “Life on Earth probably played a major role in stabilizing the world’s climate,” he says.

“The mystery of why we have not yet found evidence of aliens may have less to do with the possibility that the origin of life or intelligence and have more to do with the rarity of the rapid development of biological regulation of feedback loops on planetary surfaces “refers Chopra.

Planets in dry, rocky, with ingredients and sources of energy to life seem to be everywhere, however, as physical said Enrico Fermi in 1950, found no evidence of extraterrestrial life.

A plausible solution Fermi paradox, the researchers say, is to reduce the explanation of the absence of life universal principles, which they have called the ‘Gaian bottleneck.

“The base model’ Gaian bottleneck is based on the vast majority of fossils will find themselves in the universe of microbial life extinct and not of multicellular species like dinosaurs or humanoid, they need billions of years to evolve, “said the scientist.

GDA / TRADE (Peru)