61 How can humans coexist with an intelligent carnivorous species? 2016-08-13T19:50:28.057
58 Would it be possible for an Earth-sized world to speak a single language? 2015-05-25T15:26:23.580
54 What could cause sugary rain? 2017-12-15T22:04:01.047
52 Creating a realistic world map - Coastlines 2015-07-27T17:30:55.387
44 Is there a scientifically valid explanation for a circle of islands? 2017-06-28T08:20:26.410
42 Multiple "keys," multiple "doors". Any "key" fits any "door" but a "key" can only be used once. How could such mechanic be described lore-wise? 2018-11-07T20:09:59.837
41 What could cause an avian species to become intelligent? 2014-10-23T13:08:03.367
39 How can I explain a planet with perpetual rain? 2015-04-14T15:51:27.403
37 How would multi-race humanoid evolution happen? 2015-02-11T17:29:18.173
37 Stumped: How can I get a huge Earth-like planet? 2015-04-23T15:56:28.327
37 Can we build a world in 1,000 years? 2017-02-20T10:13:03.377
36 What would limit the size of a sail-powered sea cargo ship using modern (or near future) technologies, and how big could we go? 2016-12-12T16:05:08.730
36 How to stop a massive canal system from silting up? 2017-11-27T11:13:51.520
33 Of strange atmospheres - the survivable but unbreathable 2019-05-21T15:46:08.457
31 Just how unrealistic is a hovering city? 2015-04-17T15:18:03.963
31 Where to hide my evil Overlord? 2016-06-29T10:34:52.573
30 In what era or tech level in earth's history did people have the ability to cross a super-earth's ocean 50,000 km wide? 2018-05-03T07:15:33.503
30 What do you make bricks out of in the rainforest? 2018-09-05T12:10:03.020
30 How would trees communicate? 2019-01-06T06:41:43.207
30 How can I make raindrops bigger? 2019-01-10T20:02:24.280
29 Terrestrial Exoplanet Skies – I've Built a Visual Sky Chart. Is it Correct? 2017-12-18T04:53:27.030
27 Humans born without legs: how would they thrive? 2014-10-07T21:59:16.473
27 Could the Industrial Revolution be delayed indefinitely? Or is it inevitable once a certain point in development is reached? 2016-11-16T09:37:57.390
27 Would glacier 'trees' be plausible? 2019-04-30T14:57:25.617
26 Can you add a mini moon to Earth? 2015-08-26T21:18:36.730
26 Can every animal eat most other animals? 2016-03-28T15:38:25.700
26 How can I make manure without cows? 2018-01-17T14:26:27.520
25 How to Survive Mountain Environments With a Tribal Culture? 2014-09-16T18:19:05.860
25 Could a Spaceship Enter/Exit the Atmosphere Without Landing 2017-04-03T16:39:37.573
25 What sort of beak would a bone marrow eating bird have? 2018-07-29T00:04:49.630
25 Moonlight bright enough to see by 2019-10-09T15:33:53.450
25 Would common people in central Europe in the 15th century notice that the whole Asia disappeared? 2020-01-30T18:17:51.943
24 How do I blend cultures - naming world features? 2014-09-30T15:07:59.663
24 How to explain the co-existence of peace and violence in religion 2015-01-06T15:00:03.877
24 How does a Blood Shaman gain his power? 2018-02-01T03:59:38.260
24 Purple soil - how would it be possible? 2018-02-08T13:28:18.800
24 In what sequence should an advanced civilization teach technology to medieval society to maximize rate of adoption? 2019-09-13T03:05:06.220
23 How would a civilization that has been living on a "cube" Earth differ from one on a "spherical" Earth? 2015-01-16T17:31:22.413
23 What could cause the Earth to be so endangered that mankind needs to relocate to another system? 2017-04-20T09:29:22.880
23 How many tectonic plates should my planet have? And why? 2018-06-05T14:09:46.463
22 Cataclysmic event resulting in a region of glass? 2014-11-07T16:25:26.287
22 A world with far more mobile continents? 2015-06-16T15:39:40.287
22 Creating a realistic world map - Vegetation/Biomes 2015-09-02T16:53:56.697
21 What kind of star should I use for my world? 2014-10-06T17:21:57.047
21 How desolate can I make a habitable world? 2016-10-11T06:17:14.133
21 Is it possible to have a habitable planet unsuitable for agriculture? 2016-10-13T18:59:25.560
21 How can we have dragon-sized butterflies? 2017-04-18T00:42:34.410
21 Under what conditions would humanoids evolve eyes in the backs of their heads? 2018-01-08T16:16:47.700
21 How do I maximize a planet's wave height (on average)? 2018-06-19T16:14:05.080
20 How can I have a caravan without camels? 2017-04-20T13:53:09.697
20 How can I test to find the continent's "best" young mages? 2018-10-16T13:55:40.417
19 What's the quickest way to add oceans to a planet? 2016-03-30T15:07:19.673
19 How to create the eternal storm? 2016-09-14T22:31:23.360
19 How to explain lack of flatland? 2016-11-18T21:54:48.280
19 Earth-like Moon around the Gas Giant. Eclipse length? 2017-02-13T04:44:01.993
19 Blue soil (aka dirt) in an earth-like planet? 2017-10-08T15:21:22.563
19 Can an earth-like world lack mineable iron? 2018-01-23T04:12:53.403
18 What methods of transportation would develop in a Stone Age society in a forest world? 2015-01-24T20:46:44.240
18 What can prevent moderately advanced humans from driving megafauna to extinction? 2016-02-25T16:12:05.347
18 Economy without inflation 2017-05-11T05:17:00.557
18 Are un-populated areas on a continent with countries at least a thousand years old possible? 2017-06-09T05:27:38.847
18 How deep would the ocean be if continents all eroded away? 2017-06-27T13:54:48.590
18 Can a civilization be reduced to the Stone age by a conventional war? 2017-12-14T18:56:25.033
18 How can a portal that connects two planets affect the environment? 2018-08-30T08:06:26.457
17 What would the effects be on a earth-like planet if the magnetic field was much stronger 2015-06-04T21:38:58.353
17 Planetary colonization by a female crew 2015-08-12T10:11:09.107
17 Could animal life develop on the TRAPPIST-1 planets? 2016-05-04T02:59:50.587
17 What would be the tallest possible height for humanlike creatures in earthlike conditions? 2016-08-14T23:15:06.487
17 If Earth was tidally locked to the sun, where on the surface would the climate be mildest or most hospitable? 2017-06-29T14:28:12.800
17 What should seas be filled with to make boats impossible without balloons 2018-02-09T20:54:43.227
17 Is It Possible to Have Different Sea Levels, Eventually Causing New Landforms to Appear? 2019-09-18T17:46:37.980
16 What could make an insect race intelligent? 2014-11-23T17:39:48.160
16 What common structures and systems exist in global organized religions? 2014-12-16T19:01:59.667
16 What would the Earth eventually look like, if it was somehow stripped of its atmosphere today? 2015-08-19T11:33:46.347
16 Storms on a low-gravity planet 2015-10-21T14:34:21.713
16 How quickly can I form a mountain chain? 2017-03-13T13:36:54.583
16 Could a small country economically construct rudimentary aircraft carrier? 2017-04-06T12:56:17.340
16 What would produce the most uneven but earthlike planetary surface? 2017-10-09T16:08:06.057
16 How could a Great Chasm be created? 2017-10-25T18:02:19.863
16 What could cause the world to be almost completely submerged in water, naturally or man-made? 2018-01-16T16:20:04.260
16 Will food logistics limit the population of a civilization of obligate carnivores with modern technology? 2019-03-07T17:55:51.863
15 Does an earth-like planet have to have Ice Ages? 2014-10-15T18:44:57.650
15 What if an Earth-like planet had no axial tilt? (climate and technology) 2015-03-30T07:32:38.847
15 Creating a realistic world map - Waterways 2015-07-28T17:39:19.243
15 What is the smallest geological change possible to make human evolution untraceable? 2018-01-07T19:50:02.020
14 What are the power options for intelligent humanoid robots? 2014-10-08T19:45:36.613
14 An enviroment where a bird-like creature can survive on passive feeding 2014-10-29T14:00:39.480
14 Do different star types produce plants with different properties? 2015-03-08T20:11:55.950
14 Is there a scientifically plausible way to wipe out power & communications in an urban-fantasy Earth? 2015-05-26T19:50:44.007
14 Orbiting one star in a binary system: what are the effects of the second star on the planet? 2015-09-06T02:45:03.563
14 Can a habitable planet have mini-suns (i.e. solar satellites or glowing moons)? 2016-01-30T11:24:55.267
14 Earth-like planet with a very hot ocean? 2016-08-12T17:51:20.487
14 What would be a reasonable caliber for an assault rifle and sniper rifle for a planet with pressure of 3 atm? 2017-03-23T17:02:32.020
14 What can I add to an oxygen/nitrogen atmosphere to make it unpalatable or poisonous to humans, yet stable and breathable to local creatures? 2017-04-21T06:46:51.943
14 Can the Mongols conquer France? 2018-08-28T01:13:38.723
13 What is the likelihood that inhabitants of an alien planet similar to Earth geologically would have races? 2014-10-05T16:17:42.657
13 I would like a levitating temple on a mountain. Hand-wave free...ish 2015-10-14T15:53:26.960
13 Moon occasionally appears much larger in the sky 2016-02-15T18:00:17.057
13 Does a planet's axial tilt and seasonal progression affect a planetary-ring system, as seen from the planet surface? 2016-06-20T22:21:03.597