Activity for Fredâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
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A: Could power be generated using the temperature difference in venus's atmosphere? 100% YES It s called an updraft tower. You can actually even do that on earth in the Deserts (solar updraft towers). https://en.wikipedia.org/wiki/Solarupdrafttower On Venus you wouldn't even need the "solar" part. Just build a tall updraft tower. The question is would it make sense? By the tim... (more) |
— | about 4 years ago |
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Could we build a massive "Ark" type space station with current technology? Armageddon is coming. A giant Texas-sized meteorite on a collision course with planet Earth is discovered in 2020. It will hit Earth in 2030 and will wipe out 90% of living things including humanity. Calculations show that throwing rockets packed with nukes at it to deflect it would be unsuccessful. ... (more) |
— | almost 5 years ago |
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Subsurface alien life on Titan moon Is subsurface life possible on Titan (Saturn's moon) ? Temperatures on the surface are way too low to sustain any life ( Is it realistic to imagine that it could reach complex multicellular stage, possibly sentient? (more) |
— | over 7 years ago |
| Question | — |
Maximum gravity a land mammal could cope with Several science fiction books picture bigger Terran planets with higher gravity. I'm curious to know what would be the maximum gravity mammals similar to the one on earth could survive. Only bones types and structures that exist in our animal world are allowed, no science fiction or magic (no adamant... (more) |
— | over 7 years ago |
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Is it possible for humanity to completely annihilate itself? Is it possible for humanity to completely annihilate itself? By that I mean there cannot be one survivor left and the annihilation must be caused by humanity itself with current technology (no crazy AI killing everyone) and not by natural disasters (no giant meteorite). The following come to my min... (more) |
— | over 7 years ago |
| Question | — |
Could hydroponic farms reasonably feed 100 billion people? I really think that we can feed way more than our current population using more advanced farming IF WE FIND A WAY TO PRODUCE CHEAP RENEWABLE ENERGY. The solution would be hydroponic vertical farms. If energy is cheap enough lots of new possibilities emerge. You could create a 100 floor high skyscra... (more) |
— | over 7 years ago |
| Question | — |
Post apocalyptic science based story This story takes place in our world around the year 2116. Global warming couldn't be avoided and a runnaway effect suddenlty started increasing temperatures much faster than experts predicted. Over a few decades, temperatures rised so dramatically and quickly that most of the landmasses started tur... (more) |
— | over 7 years ago |
| Question | — |
Would organic computers eventually be more powerful than silicon computers? Knowing that our brain uses just about a few watts of power and is as powerful as a supercomputer using megaWatts of power in 2016 and that we seem close to the physical limit of what silicon can do in terms of energy efficiency (we would need to increase efficiency more than a million times to reach... (more) |
— | over 7 years ago |