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Robert Rapplean
  • Member for 3 months
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23 votes

How can plants reliably intentionally poison those that eat their fruit?

16 votes

How can I force humanity to retreat to the ocean floor

15 votes

Could a species with human-like intelligence keep a biological caste system?

12 votes

Usability of Silver and its alloys as standard building material

11 votes

Is this concept for very low energy space travel plausible?

11 votes
Accepted

When are Turreted Railgun better than Spinally-Mounted Railguns?

10 votes

Advantages of reverse jointed legs in bipedal mechs?

10 votes

What job could someone do better with super-strength, but without actually revealing that they have it?

8 votes

Energy in a food web of robots

7 votes

Air(warships) and the 'wet navy'

6 votes

Is it possible to have a habitable planet with 2 sun that have sunset for one and sunrise for the other at the same time?

6 votes
Accepted

What would be the uses of a technology that could make things "not-exist" for a short period of time

6 votes

What would be the quickest way to sterilize a planet from several light-years away?

6 votes

How long until all detectable space debris leaves orbit of a planet?

4 votes
Accepted

Is it possible to make a self repairing Whipple-shield that doesn't loose atoms to the environment?

4 votes

What, if anything, would a person-sized vacuum sound like when being emptied and filled?

4 votes

Major underground caverns on a world with considerable geologic activity?

4 votes

Can useful second and third generation matter be synthesized?

4 votes
Accepted

Surviving time travel using black holes or wormholes

4 votes

The Emperor's Coffee House - how to build a neolithic steam engine?

4 votes

Clothing against the wind

4 votes

How much toxin could an elephant-sized amphibian put out through its skin?

3 votes

FTL gates and drives used simultaneously without redundancy?

3 votes

What would a spacefaring race use as fuel for their matter-to-energy reactors?

3 votes

Living on a giant banana world

3 votes

how plausible is this exomoon?

3 votes
Accepted

How large can the main disk of spiral galaxies get?

3 votes

What is the most plausible way for an organism to have (limited) shapeshifting abilities?

3 votes

How would a virus that only kills one sex work?

3 votes

What atmospheric pressure and temperature are reasonable to maintain water on a low gravity planet?