71 How could a natural road form across a sea? 2018-01-10T20:39:45.790

68 Would earthlike planets in other solar systems have well-known Earth gemstones such as rubies, emeralds and sapphires? 2018-04-02T13:19:17.293

57 Can stone be "recycled" by melting and cooling it? 2017-06-30T08:45:23.967

52 Creating a realistic world map - Landmass formation 2014-09-29T10:32:50.860

48 How tall can a humanoid creature be without alerting the rest of the planet with earthquakes? 2018-07-16T16:35:20.480

44 Is there a scientifically valid explanation for a circle of islands? 2017-06-28T08:20:26.410

40 What if a portal is opened from the Mariana trench to the Sahara desert? 2017-05-02T14:10:03.093

38 Evidence of spacetime anomaly in local geology? 2018-05-01T15:42:20.783

35 What size would a diamond made from a human be? 2017-11-21T16:32:30.397

34 Creating a realistic world map - Mineralogy 2015-09-04T15:44:02.043

33 Could we reach the earth's core using today's nuclear arsenal? 2016-07-04T16:26:48.050

32 Gravity on a Minecraftian world? 2015-03-20T23:43:20.120

28 How can I launch a projectile to hit something in orbit, using only geological structures and power sources? 2019-02-03T17:18:52.397

25 How much would it cost to recreate Doggerland as it existed before 16,000 BC? 2015-09-21T16:12:52.277

25 Ferrying an island with mortals on top. Is it possible without killing them? 2016-12-11T18:22:49.967

25 What could limit geographically a resource such as an ore to a specific spot on a planet? 2017-08-24T19:11:27.953

25 Physics of a metal-poor world 2017-10-02T20:45:22.150

25 If the Black Sea was disconnected from the Mediterranean, how long would it take to become freshwater? 2018-05-11T00:46:52.610

24 How To Make Earth's Oceans as Brackish as Lyr's 2019-09-13T00:30:56.470

23 Expanding occupied underground habitations safely? 2014-09-30T02:55:16.437

23 How many tectonic plates should my planet have? And why? 2018-06-05T14:09:46.463

23 Malign Science: Counter argument for KT boundary 2018-08-28T18:19:10.567

23 Realistic geological and chemical composition of an edible planetary surface 2018-11-13T18:22:46.807

22 A world with far more mobile continents? 2015-06-16T15:39:40.287

21 How to explain a world with very little iron? 2017-07-20T02:12:53.707

21 Is this coral lagoon geologically possible? 2018-01-09T19:50:31.130

21 An iron rain to starve a planet 2018-08-19T22:51:58.160

20 How large can a volcano be? 2015-03-25T00:36:17.953

20 Would an island-covered planet be possible? 2015-09-17T21:43:39.843

20 Valuable minerals near dormant volcanoes 2017-05-04T20:18:00.297

20 What would it take for an island to sink and rise yearly and naturally 2018-08-20T23:50:24.533

20 A hang glider, sudden unexpected lift to 25,000 feet altitude, what could do this? 2019-04-01T20:09:38.383

19 How to explain lack of flatland? 2016-11-18T21:54:48.280

19 What is the oldest a cave could possibly be? 2017-03-21T16:24:55.760

19 Would a river running through a large salt deposit turn red? 2017-10-03T22:02:00.843

19 Can an earth-like world lack mineable iron? 2018-01-23T04:12:53.403

18 New York to Los Angeles using no fuel 2015-04-28T17:16:00.983

18 Is there a way to have coal but not oil? 2017-07-31T06:16:10.837

18 Would an island where the majority of the rock is lapis lazuli be feasible? 2018-02-02T12:45:42.243

18 Could ancient seeds buried deep in subsoil sprout given the right conditions? 2018-02-15T12:35:35.357

18 Ringstadt: How sensible is my topography? 2018-08-16T19:05:58.767

18 Permanent river of lava 2019-12-04T23:27:11.020

17 Can a habitable planet have two separate crusts, both of which can sustain life? 2018-07-26T01:58:58.377

16 Would it be possible to raise a piece of land from the ocean's floor? 2014-12-13T22:24:11.817

16 How quickly can I form a mountain chain? 2017-03-13T13:36:54.583

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 How to harness electricity from crystals? 2017-11-13T17:07:14.330

16 How to explain one side of Super Earth is smoother than the other side? 2019-02-19T02:57:36.727

15 Asteroid impact. How big does it have to be to globally affect plate tectonics? 2014-10-17T19:25:08.710

15 What determines distribution of natural resources? 2015-02-04T07:54:37.150

15 Naturally-ocurring Airborne Floating Islands - is it possible? 2017-01-22T21:32:26.923

15 I need a source of a psychoactive drug or substance in a fantasy world (no magic)? 2017-11-17T13:14:52.983

15 A blue flamestorm blasting through a system of big yellow caves? 2018-08-27T13:21:35.133

14 How could a planet have zero surface caves? 2017-07-05T06:25:12.563

14 What type of stone should I use for these hills? 2018-07-23T06:30:28.797

14 Planet-wide vocalizations: is there a natural limit preventing it? 2018-09-18T15:48:33.600

14 Geological aftereffects of an asteroid impact on a large mountain range? 2019-05-26T17:53:58.717

14 Where do I put diamond mines on my map? 2019-05-27T12:45:06.573

14 How deep could dwarves actually delve? 2019-08-22T23:05:45.547

14 Where should I place my fictional continent in the South Pacific? 2019-12-15T12:36:28.903

13 Shallow sea world - plausable geology? 2014-11-20T16:38:14.357

13 A city of Sand...stone 2015-04-15T19:52:53.323

13 How can I explain a sudden abundance of naturally-occurring beer? 2015-06-28T00:34:19.937

13 Creating a realistic world map - Fuel 2015-09-09T17:18:07.970

13 A planet made of iron 2015-10-09T01:20:07.000

13 Blue Cryovolcanic Planet 2016-04-18T14:37:48.433

13 Advanced civilization on planet with atmosphere only in large sinkholes 2018-05-11T11:31:39.980

13 Ringstadt: Can my mountains be what I need them to? 2018-08-24T14:50:31.047

13 What conditions would make having them sunken into the ground the predominant way of building large structures? 2018-11-21T10:16:20.773

13 Can a liquid sand ocean exist naturally? 2019-04-18T01:07:59.100

13 Where do hydrothermal vents form inside icy ocean worlds? 2020-01-26T22:23:33.947

12 How could you dig a hole through the fluid mantle of a planet? 2014-10-01T10:08:10.300

12 How to end the world by earthquake? 2016-05-03T08:41:31.073

12 Could humans dig out a 20km tunnel through quartzite by hand? 2016-05-28T11:44:06.160

12 Can fields be destroyed by water so that new ones need to be dug up? 2018-06-23T12:31:30.763

12 What would the geologic record look like on a planet in the galactic halo? 2020-02-06T16:45:51.877

11 If Yellowstone experienced another level 8 eruption on the VEI scale, what are the largest geographical implications? 2014-10-03T13:51:02.560

11 Reasons why returning to the surface is impossible 2015-04-29T17:18:09.287

11 Likelihood of a magnetosphere with a mercury core 2015-10-09T14:00:55.423

11 Would it be possible for a large inland area to have a groundwater system with cenotes, rather than rivers? 2015-12-04T06:19:16.237

11 Natural subterranean cave formations on Mars 2016-12-07T21:25:02.473

11 How fast can dungeons be covered and how low can they sink? 2017-04-09T00:58:04.750

11 Earthquake modeling on a fictitious extraterrestrial moon 2018-03-20T17:36:59.073

11 How to calculate the thickness of the ice layer of a frozen ocean planet/moon? 2019-03-25T18:14:05.263

10 Is it possible to cool down a volcanic planet? 2014-10-21T15:25:03.167

10 How far underground could a human civilization be before it is unsustainable/inhospitable? 2015-04-25T16:37:02.050

10 Size of the volcano that ends the world 2015-05-27T14:36:08.603

10 Can a planet with only one pole cap exist? 2016-07-05T20:00:13.917

10 What calendar or time cycle would an underground civilization use? 2017-05-07T21:35:22.720

10 Volcanoes in Orbit! 2017-11-04T14:26:04.260

10 Long Term Zircon Data Storage 2018-09-17T22:04:00.077

9 The really really big mountain 2015-12-10T22:22:23.393

9 How long would it take a region to geologically settle down after a major cataclysm? 2016-05-24T20:16:02.233

9 Could there be more than two poles on Earth? 2017-01-18T20:13:41.540

9 How thick should the roof of a large cave be to safely build a city on top of it? 2017-07-18T22:15:30.540

9 How do I create a geologically realistic series of mountain valleys cutoff from the world? 2017-10-24T23:57:46.000

9 How to craze the surface of a planet? 2017-11-05T10:18:06.767

9 Is an offset mountain range plausible? 2018-02-28T09:30:14.367