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11 votes
Accepted

How is it thought that phosphine is synthesized by living organisms on Earth?

The background to phosphine production on Earth can be found in a review entitled “Natural Products Containing ‘Rare’ Organophosphorus Functional Groups” by Petkowski et al. in Molecules 24, 866 (...
David's user avatar
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7 votes

How is it thought that phosphine is synthesized by living organisms on Earth?

Detection and role of phoshine in phosphorus cycle was first discussed in 19881. They examined phosphorus cycle in open-air sewage treatment plants where they discovered a gas releasing from sediments ...
Nilay Ghosh's user avatar
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6 votes

Is designing alien life still just science fiction?

First, you can check out this Wikipedia entry: Hypothetical Types of Biochemistry. I caution you that the scientific utility of many of these hypotheses isn't great since they are, at least currently, ...
canadianer's user avatar
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5 votes

Could biofilms float and survive in the sulfuric acid clouds of Venus?

I have pondered life on Venus. I think the biggest problem would be lack of free water. The atmosphere is thick and under high pressure, and polar CO2 and H2SO4 like to bind with water. There is no ...
Willk's user avatar
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5 votes

Is designing alien life still just science fiction?

The answer to this question can go as far as anybody's imaginations. So I'll just tell why the answer is what it is, and try to include scientific facts (possibly with references) wherever possible. ...
another 'Homo sapien''s user avatar
4 votes

What is the lowest pressure at which plants can survive?

No, the lowest pressure at which plants can survive is not around 0.47 atm. It is 0.07 atm or less in the case of ryegrass. And it's the total pressure. Not partial pressure of one of the constituent ...
Hu Wanztunou's user avatar
4 votes

What is the lowest pressure at which plants can survive?

Short answer : around 0.47 atm World's highest plants discovered growing 6 km above sea level If this Air Pressure Calculator is to be believed that should be 0.47 atm, so for plants 'the lowest ...
Pelinore's user avatar
  • 801
4 votes
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Would current-day human-initiated panspermia be effective?

Okay, there are technically four questions here, but I'm willing to have a stab anyway. [Are there organisms that c]ould survive [65,000 years], perhaps frozen or in a dormant state; Probably/...
arboviral's user avatar
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4 votes

Is designing alien life still just science fiction?

Is there a biological field for designing life? The field is called synthetic biology. It is a very new field. With not many player. Currently being constructed is a synthetic yeast Sc2.0. There is ...
JayCkat's user avatar
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3 votes

Have we found any other life form outside our planet?

No, there has been no evidence found of extraterrestrial or off-Earth life, at least as publicly-shared information. Via NASA: No life beyond Earth has ever been found; there is no evidence that ...
Alex Reynolds's user avatar
3 votes
Accepted

How correlated is the chirality of different molecules?

Hypothetically if an alien species were found , and if they contained similar biochemical polymers (DNA with A,T,C,G , Protein with 20 Amino acids etc) then we MAY be able to conclude that they share ...
Amirreza Mousavi's user avatar
2 votes

What is the highest pressure at which plants can survive?

See Effect of very high pressure on life of plants and animals (2012). Judging from the fact that all the living creatures we have examined, both animals (tardigrades and Artemia) and plants (...
DavePhD's user avatar
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2 votes

What factors allow some species to outcompete species formed by the local environment and become invasive?

You are right, most species cannot invade most new environments, they have to be specially adapted to the new environment. For example, a jungle frog can't invade a desert; it'll dry out and die. You ...
A Friendly Fish's user avatar
2 votes

Have we found any other life form outside our planet?

There is some debate about this, but there's a chance that we have found alien microbial fossils. In 1984, a meteorite that originated on Mars was found in Antarctica. In 1996, odd microscopic ...
Ryan_L's user avatar
  • 181
1 vote

Is this panspermia mechanism feasible?

The theory is staggeringly improbable. However, so is life. The probability of life emerging from non-life is the basis of the misguided idea of intelligent design (a thinly veiled repackaging of ...
Karl Kjer's user avatar
  • 7,663
1 vote

Would current-day human-initiated panspermia be effective?

There are many organisms capable of surviving in extreme environments. While 65,000 years is a long time for any organism, it is possible for some, or even all, of a 100g sample to survive long enough ...
Astrolamb's user avatar
  • 511
1 vote

What is the lowest pressure at which plants can survive?

... almost 8 years later.. A newer experiment with a timespan of 1.5 years on another one lichen species suggests that there is .. a minor resistance potential of the lichen Buellia frigida ...
J. Doe's user avatar
  • 423

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