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Arkenstein XII's user avatar
Arkenstein XII's user avatar
Arkenstein XII's user avatar
Arkenstein XII
  • Member for 6 years, 4 months
  • Last seen more than 4 years ago
  • New Zealand
30 votes
6 answers
7k views

How big is my Giant?

15 votes
6 answers
2k views

Hypothetical maximum number of embryos from one woman?

10 votes
5 answers
849 views

Reality Check: Discovery of Iron Bloomery without a preceding Bronze Age?

9 votes
2 answers
316 views

Subtropical Ridges on a Cold Planet?

9 votes
1 answer
408 views

Orange Suns and Blue Jupiters

8 votes
2 answers
378 views

Tolerable range of surface gravities for interplanetary colonists?

8 votes
1 answer
210 views

Visibility of a Red Dwarf Companion Star

8 votes
3 answers
341 views

Which moon is most favourable as a refuelling station?

6 votes
1 answer
430 views

Feasibility of an Antimatter-Catalysed Ram Augmented Interstellar Rocket (AC-RAIR)

5 votes
1 answer
282 views

How fast could a Byzantine messenger travel circa 300AD?

5 votes
3 answers
364 views

Making a Plague Worse?

4 votes
4 answers
814 views

Desert Planet Realism - Minimum possible hydrosphere

4 votes
1 answer
113 views

Can Aspen forests have other species of tree present?

3 votes
0 answers
76 views

Downsides of a Magnetosphere stronger that Earth's? [duplicate]

3 votes
1 answer
222 views

Can giant planets in the habitable zone have rocky moons?

1 vote
2 answers
197 views

Do aliens gamble? [closed]

0 votes
3 answers
1k views

Realistic or not? Representative money backed by water? [duplicate]

0 votes
3 answers
592 views

TOP SECRET: How long before new technology becomes declassified?