Tag Archives: extraterrestrials

All aliens are dead

Recent research proposes that any life on habitable planets would likely be wiped out very quickly.

Analysts from The Australian National University say, in the journal Astrobiology, existence on a developing planet would most-likely “die out due to runaway heating or cooling.”

Aditya Chopra from The Australian National University Research School of Earth Sciences and lead author on the paper said, ”The universe is probably filled with habitable planets, so many scientists think it should be teeming with aliens.”

Aliens are dead. Graphic by Katie Gibson
Aliens are dead. Graphic by Katie Gibson

The major explanation, says Chopra, is the absence of solidity.

“Most early planetary environments are unstable,” Chopra said. “To produce a habitable planet, life forms need to regulate greenhouse gases such as water and carbon dioxide to keep surface temperatures stable.”

Two cases  of this are Venus and Mars; these planets could have been habitable at one point, but while Venus became a “hothouse,” Mars became a relative “icebox.”

The paper’s co-author, Charley Lineweaver, from The Australian National University Planetary Science Institute, states that any basic existence on Mars or Venus could have failed to help stabilize the environment.

The study additionally clarifies Fermi’s Paradox, which expresses that in spite of the high chances of habitable planets, we have yet to locate any indication of extraterrestrial life.

Scientists say that a conceivable answer to Fermi’s paradox is near universal early extinction, which they have named the Gaian Bottleneck.

In exploration planning to see how life may develop, the researchers acknowledged that new life would regularly cease to exist because of runaway warming or cooling on their developing planets.

Around four billion years ago, Earth, Venus and Mars might 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, neglected to balance out the quickly evolving environment, said co-author Associate Professor Charley Lineweaver from the Australian National University Planetary Science Institute.

Rough, wet planets, with the ingredients and vitality sources required for life appear to be omnipresent, on the other hand, as physicist Enrico Fermi called attention to in 1950, no indications of surviving extraterrestrial life have been found.

A copy of the paper can be downloaded here.

Mother Mars

When we envision Martians visiting Earth, the image is usually one of little green men stepping out of a flying saucer and greeting the astonished humans. We don’t usually imagine bacteria from Mars arriving on Earth via meteorite and then over millions of years evolving into humans. But according to Time, that may be exactly what happened all those years ago. Continue reading Mother Mars