Activity for subrunnerâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
From how far away can it be deduced that there is sentient life on earth? The Aargh are a humanoid alien race a couple solar systems away. Their home planet is quite earth-like (oxygen atmosphere, a lot of water, traditional organic chemistry even if a few proteins are different to earth), and in the habitable zone of their solar system. They have colonized several planets... (more) |
— | over 4 years ago |
| Question | — |
Walking across lava What would it look like if a human (with the proper protection) walked across a lava stream? Assume that 'proper protection' means some way of insulating against the heat so that they don't get cooked alive (insulation does not hold forever, but at least a couple of hours before the human loses c... (more) |
— | over 4 years ago |
| Question | — |
What does a person in a light-bending invisibility cloak look like from behind? So, yesterday I found an invisibility cloak in my attic. It's got an instruction manual with it, and there it was mentioned that it is truly an invisibility cloak: it bends the light (actually, all electromagnetic radiation) around the wearer so that absolutely nothing can detect the wearer when look... (more) |
— | over 7 years ago |
| Question | — |
How long could the sun be turned off without overly damaging planet Earth + humanity? Background story: Current Earth, in the close future. Astronomers have found first signs of extraterrestrial life: huge sheet-like objects (with surfaces easily as large as the surface of the Earth) appear all around the sun. They do not approach Earth, but remain in stationary spots relative to eac... (more) |
— | over 7 years ago |
| Question | — |
How to create 'visible' space-laser-like weapons Goal: Just imaging a Star Wars X-Wing fight, and you've got the idea. However, I want to know whether something like that is possible without tons of metaphysical hand-waiving and 'just because'. What I've figured out so far: Sound can be an auxillary computer program to help the pilot process in... (more) |
— | about 8 years ago |