Activity for Sigma Ori
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
In a spinning Dyson ring, would objects not touching the surface experience gravity? I have a world inside a Dyson ring with a radius of 1 AU, complete with humans, animals, plants, clouds, and Earth-like atmosphere. The ring is spinning at a particular angular speed, giving the inhabitants on the surface the experience of Earth's gravity at sea level. How convincing is this pseudo-... (more) |
— | almost 6 years ago |
| Question | — |
Could a dryad species be scientifically plausible? On a fantasy-themed planet with Earth-like humans and plants, over a very long period of time, a dryad-like species has evolved. Dryads look mostly like regular humans, but they have a few qualities that differentiate them, like green hair, special reactions to sunlight (see Zotoh Zhaan from Farscape... (more) |
— | about 7 years ago |
| Question | — |
Could a civilization without access to computers have cryptography? There's a person who has enough working knowledge of our current real-world methods of cryptography (e.g. knows how a few modern algorithms work and could implement one or two from scratch). That person becomes a member of an alien civilization where people are generally intelligent and educated (in... (more) |
— | over 7 years ago |