Life on other planets would likely be brief and become extinct very quickly, say astrobiologists from ANU Research School of Earth Sciences.
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, lead author on the paper, which is published in Astrobiology.
“Early life is fragile, so we believe it rarely evolves quickly enough to survive.”
“Most early planetary environments are unstable. To produce a habitable planet, life forms need to regulate greenhouse gases such as water and carbon dioxide to keep surface temperatures stable.”
About four billion years ago Earth, Venus and Mars may have all been habitable. However, a billion years or so after formation, Venus turned into a hothouse and Mars froze into an icebox.
Early microbial life on Venus and Mars, if there was any, failed to stabilise the rapidly changing environment, said co-author Associate Professor Charley Lineweaver from the ANU Planetary Science Institute.
“Life on Earth probably played a leading role in stabilising the planet’s climate,” he said.
Dr Chopra said their theory solved a puzzle.
“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 or intelligence and have more to do with the rarity of the rapid emergence of biological regulation of feedback cycles on planetary surfaces,” he said.
Wet, rocky planets, with the ingredients and energy sources required for life seem to be ubiquitous, however, as physicist Enrico Fermi pointed out in 1950, no signs of surviving extra-terrestrial life have been found.
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 Associate Professor Lineweaver.
Read more: The aliens are silent because they are extinct
The Latest on: Gaian Bottleneck
[google_news title=”” keyword=”Gaian Bottleneck” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Gaian Bottleneck
- FG, IITA Partners to Tackle Nigeria’s Agriculture Sector Bottleneckson March 23, 2023 at 5:00 pm
The federal government and the International Institute of Tropical Agriculture (IITA) have entered into a partnership arrangement that would find lasting solutions to the nation’s agricultural s ...
- Solar energy boom may face network bottleneckon March 22, 2023 at 4:07 am
If large-scale solar power farms begin to be built in eastern Finland, the capacity of Fingrid's power line network may become a bottleneck. Upgrading carrying capacity could easily take 7–8 years, so ...
- WoodmenLife Removes Bottlenecks and Increases Productivity with Alationon March 20, 2023 at 9:07 am
“The Alation data intelligence platform is the foundation of our technology stack, allowing us to unlock new insights and unearth and address previously hidden bottlenecks. Processes that once took ...
- WoodmenLife Removes Bottlenecks and Increases Productivity with Alationon March 20, 2023 at 6:03 am
“The Alation data intelligence platform is the foundation of our technology stack, allowing us to unlock new insights and unearth and address previously hidden bottlenecks. Processes that once ...
- $10 million project expected to ease bottlenecks at this major Charlotte interchangeon March 18, 2023 at 11:50 am
Good news for Charlotte commuters. The state has awarded a $10.6-million contract to reduce bottlenecks at the Interstate 485/N.C. 16 (Brookshire Boulevard) interchange, highways officials said ...
- Health sector suffers from institutional bottleneckson March 15, 2023 at 2:02 am
Institutional bottlenecks have caused shortages in drugs, machinery and supplies at public hospitals in recent months. The government has made urgent decisions to ‘rescue’ the healthcare sector.
- Ways to Help Avoid Bottlenecks in Your Digital Finishing Departmenton March 14, 2023 at 5:00 pm
While finishing has been on the peripheral of that process, it’s time to take a closer look at some of the tips and tricks to help address one of the largest bottlenecks most printers are ...
- Chip Design Software Turns to AI to Relieve Throughput Bottleneckon March 13, 2023 at 5:00 pm
Electronic design automation (EDA) software is inthe midst of a major evolution as artificial intelligence (AI) is gradually being phased into many design tools to relieve the traditional bottlenecks ...
via Bing News