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Q&A

Posts tagged origin-of-life

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Q&A Asteroids with an atmosphere

What would be the likelihood of an asteroid developing a thin layer of gas? If an asteroid is capable of having an "atmosphere", then how likely would be be for primitive plant life, such as a moss...

1 answer  ·  posted 5y ago by Sylvanus‭  ·  last activity 4y ago by Sylvanus‭

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Q&A Appropriate liquid/solvent for life in my underground environment on Venus

Partly inspired by this question My Venusians are happy in their cloud top city when a small group somehow (with lots of handwaving) crashes to the surface, falls underground, and ends up in a hid...

3 answers  ·  posted 5y ago by conman‭  ·  last activity 5y ago by conman‭

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Q&A A planet made of iron

Our planet has a surface full of silicates and a core made of iron. It's due to this that Earth is the way it mostly is - most rocks and many minerals contain some form of silica. But what about a ...

5 answers  ·  posted 8y ago by Greenstack‭  ·  last activity 5y ago by Greenstack‭

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Q&A Origin of life on a waterworld

Take a planet like Gliese 1214 B, which has no land, an ocean 100s of kilometres deep and a seabed of Ice VII. For the purposes of the question, let's assume that the pressure and/or temperature ne...

1 answer  ·  posted 5y ago by SealBoi‭  ·  last activity 5y ago by SealBoi‭

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Q&A Can life arise on a brown dwarf?

Brown dwarfs are celestial bodies in the gray area between planet and star. They're huge, gaseous, hot compared to planets, and come in all different kinds. (1) Is it possible for life to develop...

3 answers  ·  posted 7y ago by Zxyrra‭  ·  last activity 5y ago by Zxyrra‭

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Q&A Getting energy in the oceans

We know that as a planet increases in size, its surface gets covered by oceans (more water is captured by gravity and shape is more spherical). Therefore, a planet larger than Earth can not have a ...

2 answers  ·  posted 6y ago by Kavi Vaidya‭  ·  last activity 6y ago by Kavi Vaidya‭

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Q&A Would you shoot out DNA onto baby planets if you planned to visit it someday?

The question popped into my mind when I read this. Since we know our scientists are searching for planets which might be capable of supporting life; most of them many light-years away, could the...

12 answers  ·  posted 7y ago by Nav‭  ·  last activity 6y ago by Nav‭

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Q&A Could intelligent life on Earth have been seeded by precursor aliens?

This idea comes up quite frequently in science fiction, but there has not been a question about it yet on Worldbuilding.SE. Is it possible that intelligent life was brought to Earth by an alien ci...

5 answers  ·  posted 9y ago by bazola‭  ·  last activity 7y ago by bazola‭

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Q&A Life from a dead space whale

Let's take our regular "Great Blue Star Whale", with a mass of about 10 000 tons. That poor, poor whale is reaching the end of its life for whatever reasons. (Damn you! Space whale hunters!). It w...

5 answers  ·  posted 7y ago by Dastardly‭  ·  last activity 7y ago by Dastardly‭

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Q&A What would be the consequences of a world that has only one dominant species of non-oceanic animal life?

I have a world that has unexpected lifeforms detected. There are to-be-revealed reasons for it, but the way the ecosystem is set up is: Microbial life is abundant everywhere There is a single sp...

3 answers  ·  posted 7y ago by Michael Stachowsky‭  ·  last activity 7y ago by Michael Stachowsky‭

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Q&A Can life be powered by thermal conduction?

I have a world in mind that is essentially a planet-wide underground ocean. The planet doesn't have a strong magnetic field, so radiation on the surface is too high to allow life, but what I'm thin...

3 answers  ·  posted 8y ago by DaaaahWhoosh‭  ·  last activity 8y ago by DaaaahWhoosh‭

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Q&A Life under the surface of Ganymede

Inspired by this article about the recent discovery of a subsurface ocean. So now we know it has a liquid water ocean and a magnetic field. The subsurface ocean is also protected from radiation by...

2 answers  ·  posted 9y ago by Isaac Kotlicky‭  ·  last activity 8y ago by Isaac Kotlicky‭

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Q&A Planetary Habitability at twelve to seven billion years ago

Following this question, I had additional question of habitability. Assuming that life could exist on planet formed roughly twelve billion years ago, allowing complex life to exist as of seven bill...

4 answers  ·  posted 9y ago by Hendrik Lie‭  ·  last activity 9y ago by Hendrik Lie‭