Why haven’t we found aliens yet Maybe they’re all dead

The mystery of why we have not found signs of aliens yet may have been solved by scientists, including one of Ind-ian-origin, who suggest life on other planets wou-ld likely be brief and become extinct very quickly.

In research aiming to understand how life might develop, the scientists realised new life would commonly die out due to runaway heating or cooling on their fledgling planets. “The Universe is probably filled with habitable planets, so many scientists think it should be teeming with aliens,” said Dr Aditya Chopra from the Australian National University Research Sch-ool of Earth Sciences. “Early life is fragile, so we believe it rarely evolves quickly enough to survive,” said Chopra. “Most early planetary environments are unstable,” he said. About four billion years ago Earth, Venus and Mars may have all been habitable. “The mystery of why we haven’t yet found signs of aliens may have less to do with the likelihood of the origin of life and have more to do with the rarity of the rapid emergence of biological regulation of feedback cycles on planetary surfaces,” said associate Professor Charley Lineweaver.

A plausible solution to Fermi’s paradox, say the researchers, is near universal early extinction, which they have named the Gaian Bottleneck. “One intriguing prediction of the Gaian Bottleneck model is that the vast majority of fossils in the universe will be from extinct microbial life, not from multicellular species such as dinosaurs or humanoids that take billions of years to evolve,” said Lineweaver. The research was published in the journal Astrobiology.