Posts by DrBob
I totally get why humans who have colonised a low gravity environment (Mars or an asteroid, for instance) are skinny. Muscles doing less work, square cube law, force output of a muscle proportional...
If a spy is getting a fix on a satellite and transmitting a tightbeam transmission to it (encrypted of course), there will be signal leakage. Can the spy be detected by the good guys, by them notic...
At what levels of carbon dioxide do humans have breathing problems (e.g. hyperventilation) or adverse medical effects? And what level would people need to wear breathing apparatus to survive? This ...
There are various arguments on the web stating that the domestication of zebras is impossible, because zebras are bad tempered and skittish, and/or animals elsewhere are even-tempered and friendly....
Inspired by this question about a fantasy World Tree, I thought I'd ask about the science fiction equivalent: a Dyson Tree. Dyson Trees are a living tree planted in a comet, which when fully grown ...
Western civilisation fell over a few centuries ago, because the Earth shifted back into a full on ice age climate. Oh and Skynet kind of happened. Ice sheets expanded, inexorably rolling over the...
I'm designing planets for a hard (ish) science fiction RPG setting. So I want to find out if there are any clues or theories as to what proportion of planets with life will have the basic biochemis...
I'd like an alien to be warm-blooded, but have external gills. Imagine a kind of giant crab or woodlouse (pillbug) which spends part of its time on land and part of the time in the sea. However, ex...
I'm writing a roleplaying game scenario set on a space station, and was wondering how the lifts (elevators) would work? Specifically, the people who built the station are very health and safety con...
The situation: the good guys are attempting to infiltrate an enemy base, and cause mayhem either in person and/or by planting explosives and running away. They know there is a big dust storm on the...
