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Rigorous Science

Posts tagged life

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Q&A Could complex Precambrian life be possible?

I have a really good question. Could it be possible for complex life to have existed in the Precambrian? I'm aware that only the fossilized remains of bacteria have been discovered from that time p...

1 answer  ·  posted 4y ago by Daikyu Maryu‭  ·  last activity 4y ago by Daikyu Maryu‭

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Q&A How to plausibly reanimate a person?

What hypothetical scientific procedure could be used to reanimate someone who is brain dead. I am aware that it is possible to bring someone back if they are clinically dead which is where a vital ...

2 answers  ·  posted 4y ago by DEMI‭  ·  last activity 4y ago by DEMI‭

Question death life
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Q&A Could life generate twice on a planet using slightly different materials?

Extremely low possibility, but if life synthesizes from scratch after life has existed on a planet for a few million years, would the two separate lineages be able to co-exist?

2 answers  ·  posted 4y ago by Double_S‭  ·  last activity 4y ago by Double_S‭

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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 Habitable Planet with Highly Eliptical Orbit

Would it be possible for life to develop on a planet with a highly elliptical orbit? (Similar to a comet, but possibly less extreme.) If so, what conditions would be necessary and what would the li...

12 answers  ·  posted 4y ago by WillRoss1‭  ·  last activity 4y ago by WillRoss1‭

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Q&A Could bacteria survive on a star?

If the right requirements are met, could bacteria survive on the Sun? The bacteria would spend most of their time in hibernation and reproducing, and when the time comes, they spread out on plasma...

2 answers  ·  posted 4y ago by 2024oyefold‭  ·  last activity 4y ago by 2024oyefold‭

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Q&A Plausibility of Hexapodal Aerial Megafauna

How plausible is a six-limbed flying animal roughly the size of hatzegopteryx to be aerial? In this case, an aerial animal will be defined as a creature that solely inhabits the sky. I will call t...

1 answer  ·  posted 4y ago by MintySoftboi‭  ·  last activity 4y ago by MintySoftboi‭

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Q&A How long until land life can return after the impact?

So, it finally happened. The Earth was hit by a comet, and anyone outside of a research station at the bottom of the Atlantic is now dead, or dying. So, here's what we need to know: How big would a...

2 answers  ·  posted 4y ago by neutralParadox‭  ·  last activity 4y ago by neutralParadox‭

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Q&A Hanging World - Trees

Scenario A civilization is living on an ancient super structure, they don't know much about it, they just live there and have lived there for as long as they know. For our current situation we can ...

2 answers  ·  posted 4y ago by Nymn‭  ·  last activity 4y ago by Nymn‭

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Q&A Environment/Ecosystem for a "Sunfall" colony

I've read a lot of posts about moons around large gas giants and I think I have fairly good idea about basics to them. I'm not super great with all the science parts myself but they give me lots of...

1 answer  ·  posted 4y ago by Nymn‭  ·  last activity 4y ago by Nymn‭

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Q&A If humans evolved on Mars instead of Earth, how quickly would we have detected life on Earth?

Suppose that both Earth and Mars was booming with life in a similar way. Except that, on Earth, there was no hominid family, and no humans evolved. Instead, humans evolved on Mars. Assuming we ha...

2 answers  ·  posted 4y ago by Bridgeburners‭  ·  last activity 4y ago by Bridgeburners‭

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Q&A Iron based life

Lately I have been thinking about possible forms of life on planets that would have radically different experiences than here on Earth. I was wondering if life based on transition metals was possib...

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

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Q&A How could a creature get off a planet without technology?

Imagine a spacefaring creature, one that colonises star systems, and then shoots some of its kind on to another system (the mechanism for doing this doesn't matter). The question is, how could thi...

8 answers  ·  posted 7y ago by Gryphon‭  ·  last activity 4y ago by Gryphon‭

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Q&A Adapting to a sonic world

A planet much like Earth orbits a star much like the Sun, but with one difference: the energy from the star is magically transformed into sound within the planet's atmosphere. There is no longer st...

5 answers  ·  posted 4y ago by System‭  ·  last activity 4y ago by System‭

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Q&A Planetary neighbors

Let's say there is another planet in our solar system that harbours sentient life and this sentient life can build castles, buildings, and other such structures. When would we notice that? We ca...

5 answers  ·  posted 4y ago by AIwithstick‭  ·  last activity 4y ago by AIwithstick‭

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Q&A Algae using UV light from auroras for photosynthesis

I was reading some questions on Quora and I found this claim: The polar regions have a very odd reason for them to have so much oxygen production. You see the Polar aurora run day and night in ...

2 answers  ·  posted 4y ago by Renan‭  ·  last activity 4y ago by Renan‭

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Q&A Born and raised on a world with longer days and years - would it impact life expectancy

If humans found a habitable world and access to it, what would the effects be of a longer day to those who were subsequently born and raised there? Is there any evidence that a longer day cycle (o...

2 answers  ·  posted 4y ago by Tommy‭  ·  last activity 4y ago by Tommy‭

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Q&A How could a foam habitat support animal life?

Knowing foam is formed by trapping pockets of gas in a liquid or solid, what could a foam able to support life on an earth-like planet be made of? This foam ought to be stable enough and large eno...

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

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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 What items from the Roman-age tech-level could be used to deter all creatures from entering a small area?

Please assume the following: There is a item on the ground and I want nothing but bare earth touching it. I cannot move the item myself. The item is impervious to fire. I cannot afford to guar...

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

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Q&A How can one manipulate elementary particles to make a person live forever?

Assuming that a person has the power to manipulate all elementary particles in any way (i.e. changing them from one elementary particle to another, nuclear transmutation, moving groups of them at a...

6 answers  ·  posted 5y ago by Aloysius‭  ·  last activity 5y ago by Aloysius‭

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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 How long a human being could live with stem cells?

I once saw an experiment with mice, where they connected the bloodstream of a younger mouse to the bloodstream of an older mouse. And the older mouse became "younger", or at least healthier. If I ...

2 answers  ·  posted 5y ago by Neto Ananias‭  ·  last activity 5y ago by Neto Ananias‭

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Q&A Life on a gas giant?

I know of the conceptualized "Sinkers", "Floaters" and "Hunters" that Carl Sagan and Edwin Salpeter of Cornell conceived of - as possible life forms that might inhabit a gas giant. At the time they...

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

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Q&A Would it be possible to have three planets merge but still allow some life survive?

In my universe a race of humanoid beings caused 3 planets: Earth a larger rocky planet and another earth sized rocky planet to crash and collide into each other, but still allowed the humanoi...

3 answers  ·  posted 6y ago by BlueTangsRock‭  ·  last activity 5y ago by BlueTangsRock‭

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Q&A Would carbon-based lifeforms be able to eat silicon-based lifeforms?

In the South Galaxy, the overwhelming majority of life lives on planets, breathes air, and is carbon-based. All sentient life is carbon-based. However, in the vast reaches of space, there are some ...

5 answers  ·  posted 5y ago by The Weasel Sagas‭  ·  last activity 5y ago by The Weasel Sagas‭

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Q&A Planet Orbiting a Red Dwarf

I'm trying to create my planet orbiting a red dwarf, honestly I've thought other scenarios but it's like every answer opens new questions. I'll just say what I want my planet to be and I'd like you...

2 answers  ·  posted 5y ago by Hans‭  ·  last activity 5y ago by Hans‭

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Q&A Can I make the carbon cycle shorter - by metamorphosis from plant to animal and vice-versa

EDITED to address the above suggestion. See below. Most animals breathe in oxygen and breathe out carbon-dioxide. Most plants take in carbon-dioxide and release oxygen. Waste products from ani...

4 answers  ·  posted 5y ago by chasly from UK‭  ·  last activity 5y ago by chasly from UK‭

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Q&A Planet Blob - variable gravity

On the planet Blob there is an unusual phenomenon. It is known to emanate from the planet's core but 2018-level scientists have no understanding of it. The phenomenon Gravity isn't constant. It v...

2 answers  ·  posted 5y ago by chasly from UK‭  ·  last activity 5y ago by chasly from UK‭

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Q&A Space Whales, how to survive?

We have escaped the galactic government, and now our greatest endeavour yet, life in space. How will these gargantuan space entities eat and survive in space? The whale or other in question is th...

3 answers  ·  posted 6y ago by Mendeleev‭  ·  last activity 5y ago by Mendeleev‭

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Q&A If humans were biologically immortal, but had an average lifespan of 100 years, what would the distribution of ages be?

Let's say that humans were biologically immortal. Once they reach adulthood, they effectively stop aging. Due to disease though, the average lifespan is 100 years. (In practice, your access to heal...

6 answers  ·  posted 5y ago by PyRulez‭  ·  last activity 5y ago by PyRulez‭

Question immortality life
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Q&A Could this moon of a gas giant orbiting a neutron star support life?

Making the following assumptions: 1. The three moons of the Gas Giant are safe enough distances from and massive enough not to pull each other apart or send themselves careening into the void. 2...

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

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Rigorous Science Smallest possible habitable planet? (also taking density into account)

I have seen a few similar questions but none seem to take the density of a planet into account. I'm creating a planet on which several small civilisations develop. The planet needs to have a few bi...

8 answers  ·  posted 7y ago by System‭  ·  last activity 5y ago by System‭

Question planets gravity life
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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 Is it possible for humanoid life to develop on a 1.4 G planet?

I'm writing a JRPG-inspired novel set on a planet with 1.7 Earth masses and 1.4 Gs, but is it possible for life to even develop on such a high-gravity planet in the first place? I tried scouring th...

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

Question planets gravity life
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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 Could life develop above a planet's atmosphere?

Imagine a planet with extremely low density, and thus low gravity and an equivalently thin atmosphere, but a very active and strong magnetosphere that prevents solar radiation from destroying compl...

3 answers  ·  posted 6y ago by Jacob‭  ·  last activity 6y ago by Jacob‭

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Q&A How long would it take until we realise that suddenly nobody can conceive a child regularly?

Some time ago I asked: "How long would it take until we realise that people stopped dying from natural causes?" I today realized that similar but much more interesting (and more realistic...) ques...

2 answers  ·  posted 6y ago by TGar‭  ·  last activity 6y ago by TGar‭

Question earth medicine life
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Q&A Can you create a small atmosphere with giant walls?

Can you create an atmosphere on a celestial satellite by using giant walls? Perhaps assisted with some means of technology? In a story I am creating I want to create something different from the no...

2 answers  ·  posted 6y ago by Dayton Saragosa‭  ·  last activity 6y ago by Dayton Saragosa‭

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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 How do you get a thick atmosphere with less than earth-like gravity?

Basically: I want a highly viscous atmosphere but I want people to be able to walk around. I was thinking earth's gravity * 0.6 or similar. I was thinking that an atmosphere of Sulfur Hexafluorid...

4 answers  ·  posted 6y ago by cwallenpoole‭  ·  last activity 6y ago by cwallenpoole‭

Question atmosphere gas life
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Q&A Life on a water-ball planet

I'd like to explore some details on a so-called water-ball planet (i.e. a planet in the habitable zone of a sun, covered by a 100 km deep ocean). I am particularly interested where life could devel...

1 answer  ·  posted 6y ago by jk - Reinstate Monica‭  ·  last activity 6y ago by jk - Reinstate Monica‭

Question planets life
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Q&A Could a decreased heartrate thanks to better hemoglobin lead to an increased lifespan?

When looking at mammals and their heart rates one can find a correlation between the lifespan of a mammal and their heart rate. Namely most mammals seem to get about 1 billion (the American one) of...

4 answers  ·  posted 6y ago by dot_Sp0T‭  ·  last activity 6y ago by dot_Sp0T‭

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Q&A Surviving on a planet with an eccentric orbit

I have this planet that's 1.8 times the size of Earth on an eccentric orbit around a star that's 0.2 times the size of the sun. Its apses often change due to the influence of a neighboring gas gia...

1 answer  ·  posted 6y ago by JPrescott‭  ·  last activity 6y ago by JPrescott‭

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Q&A How could a parasitic organism spread through humans?

I have an idea for a crazy super-organism which could wipe out the human race. Essentially, it is an organism (plant or fungus or bacterium depending on what would be more effective or what would b...

3 answers  ·  posted 6y ago by C. R. Yasuo‭  ·  last activity 6y ago by C. R. Yasuo‭

Question parasites life
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Q&A Finding Signs of Life from afar

If I were to attempt the colonization of a planet with preexisting life, how would I manage to pinpoint a candidate planet from the comforts of Earth's orbit? I am interested in the stars somewhere...

4 answers  ·  posted 7y ago by System‭  ·  last activity 6y ago by System‭

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Q&A Can there be life on a planet with water, but without atmosphere?

Recently, a planet around Proxima Centauri has been found. It is in the habitable zone, in the sense that if the planet was a black body, it would have a surface temperature of −39° Celsius. The p...

6 answers  ·  posted 7y ago by Turion‭  ·  last activity 6y ago by Turion‭

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Q&A Space Whales, how to move?

We have escaped the galactic government, and now our greatest endeavour yet, life in space. How shall these gargantuan space entities move and travel through space? The whale or other in question...

2 answers  ·  posted 6y ago by Mendeleev‭  ·  last activity 6y ago by Mendeleev‭

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Q&A Phonosynthesis - ecosystem where "plants" extract energy from sound, not light

I have an idea about a planet that is cold and dark, but very loud. Constant rolling storms, crashing glaciers and icesheets, earthquakes, volcanoes and so on. Instead of photosynthetic plants, as...

1 answer  ·  posted 7y ago by Tom O'Daighre‭  ·  last activity 7y ago by Tom O'Daighre‭