119 Releasing a T-Rex into a modern ecosystem wouldn't be that bad, right? 2017-12-10T22:07:51.813

105 How fast can I flood the Netherlands entirely and permanently? 2018-06-18T19:04:54.990

68 Is there a real life substance like movie acid? 2017-05-30T14:29:32.430

57 What impact would a dragon the size of Asia have on the environment? 2019-07-14T15:15:28.293

54 What could make an area of land be accessible only at certain times of the year? 2016-10-17T03:27:25.740

53 How could mushroom/fungi forests be possible? 2017-10-15T23:24:18.283

51 If a large space ship crashes on a planet, what could kill passengers without obliterating the ship? 2018-07-26T16:35:40.887

49 How to not starve gigantic beasts 2019-04-24T12:14:53.230

45 Could humanity survive the sun going dark? 2015-02-05T03:53:28.927

44 Why would a berry have a slow-acting poison? 2019-11-20T20:11:44.787

42 How would societal development be impacted if humans were not an apex predator? 2014-09-16T19:45:15.200

42 Can plants survive without animals? 2016-07-19T12:40:18.110

41 What social and environmental factors would create a culture where wives had more than one husband 2016-03-16T13:15:48.733

41 Can guns be rendered unusable by changing the atmosphere? 2016-11-17T20:58:10.793

41 So we glassed it, now what? 2017-10-08T11:25:10.067

38 In a post-fossil fuel economy, what could natural gas pipelines be used for? 2018-06-07T13:33:41.330

37 How long can an abandoned, semi-sheltered computer remain bootable? 2014-12-07T02:48:19.427

37 Benefits of or reasons why a species would have only one eye? 2016-03-01T06:17:36.380

36 How extensive could a habitable twilight zone be on a tidally locked planet? 2014-09-21T07:28:13.563

36 What are the effects of slicing the Earth in half with a particle beam? 2018-07-13T19:01:19.113

36 What would be the effect of a giant magical fireball burning in the ocean? 2019-10-09T02:37:50.927

35 What is the next dominant species? 2014-10-28T04:10:09.253

35 Is a food chain without plants plausible? 2016-10-19T18:43:36.897

35 Are dead worlds a good galactic barrier? 2019-10-08T16:55:57.717

34 Is there a hypothetical scenario that would make Earth uninhabitable for humans, but not for (the majority of) other animals? 2019-03-16T18:23:43.770

34 Lighthouse Alternatives 2019-09-25T11:45:45.800

33 How could mankind of ancient times cause significant climate change? 2018-01-03T11:25:46.353

33 If a patch of desert were magically displaced to the middle of a forest, what would happen to the whole forest after certain periods of time? 2018-04-03T02:15:46.620

32 Less boring classifications of earth-like terrain when making maps 2014-09-20T20:55:02.033

32 If we can have "all the comforts of home" in space why would we settle planets? 2018-08-12T11:35:51.043

31 What society might survive the 3 generation rule 2015-07-09T23:38:16.697

31 Where to hide my evil Overlord? 2016-06-29T10:34:52.573

31 In the late 1940’s to early 1950’s what technology was available that could melt a LOT of ice? 2019-03-10T17:31:17.883

30 Does living without access to sunlight for extended periods have known physical or psychological effects on humans? 2014-09-21T22:44:03.887

30 Plausibility of Mushroom Buildings 2019-03-10T18:35:23.093

29 How tall can a tree grow? 2015-02-24T15:14:33.840

28 How long would it take for a forest ecosystem to overtake New York City? 2015-05-01T15:21:07.653

28 Which shape for an infinite world with usual sun cycles? 2015-10-11T17:38:35.603

28 What could be a valid reason for an entire section of a continent to remain unexplored and undiscovered, by the rest of the world in medieval times? 2017-04-19T10:40:10.883

27 What natural protections could a small oceanic island have against tsunamis? 2017-03-21T23:09:13.680

27 Relative Super Powers 2018-06-27T16:06:06.607

26 What if an Earth-like planet had no axial tilt? (impact on ecosystem) 2015-03-31T05:37:45.657

26 The logistics of corpse disposal 2019-04-15T15:18:03.597

25 How to Survive Mountain Environments With a Tribal Culture? 2014-09-16T18:19:05.860

25 Restoring the world after a global apocalypse 2014-12-22T20:34:53.650

25 What if the seas had fresh water in them? 2015-04-22T13:41:46.840

25 Making a Planet Seem Uninhabitable 2016-12-07T16:33:25.333

24 How could a generation ship maintain a source of potable water? 2014-09-17T03:23:14.690

24 Equatorial icecaps and polar jungles a fantasy or reality? 2015-07-29T21:52:38.147

24 What effect would liquid sulfur oceans, sulfur dioxide in the atmosphere have on visibility, sound propagation and other environmental information? 2017-02-06T09:24:30.110

24 Killing the majority of humanity for ecological reasons 2017-12-12T10:51:57.127

24 The polar ice caps are melting. Can I replace them with icebergs made of pykrete? 2018-06-04T15:25:12.757

23 How can a valley surrounded by mountains be fertile and rainy? 2019-06-24T17:39:15.710

22 How much land area do my land-based animals (herbivores) need for food? 2015-12-19T13:09:31.910

22 Is my world map unrealistic? 2017-12-09T18:29:30.233

21 Effects of a non-rotating Earth 2015-02-20T17:44:44.590

21 Is it possible to have a habitable planet unsuitable for agriculture? 2016-10-13T18:59:25.560

21 Polar Heat, Equatorial Cold - Climatic Effects of Inverted Global Temperatures 2017-03-28T15:54:23.880

21 Land coral and filter feeding 2017-10-17T01:31:06.673

21 What would cause a region of land to become barren over several decades? 2017-12-14T18:13:46.810

20 How do I figure out how many people my domed city on a hostile planet can support? 2014-09-18T22:49:33.700

20 Is there a man-made or natural event that can cause an abrupt climate change within hours/a day? 2014-10-07T06:12:06.637

20 How effective are bomb shelters for nuclear attacks 2014-10-15T17:05:43.903

20 What would be the state of decay in an abandoned city? 2016-05-19T17:13:15.913

20 Avoiding preventing your own birth in a time travel paradox? 2016-09-27T07:16:28.410

20 Can massive military land vehicles be made practical? 2018-03-07T21:57:11.097

20 Why build underwater outposts, rather than ocean-surface settlements? 2018-08-12T17:25:49.990

20 Is my river map even remotely realistic? 2020-01-31T17:17:21.767

19 Can a world sustain constant low-pressure and high-pressure areas? 2014-09-16T19:03:21.220

19 Suddenly, you live in the dark! 2014-12-27T01:21:22.393

19 How to create the eternal storm? 2016-09-14T22:31:23.360

19 Could a moon or planet exist with "puddles" of breathable air in deep craters? 2018-07-30T00:06:28.097

19 Could moose/elk survive in the Amazon forest? 2019-04-24T15:50:31.863

18 What would be the next technological step for a civilization after it has depleted all resources that allow for conventional technologies? 2014-09-17T07:45:24.663

18 Food sources for an undergound city 2014-09-27T15:04:50.177

18 Is it possible for life to evolve on planets without water? 2014-10-04T17:45:36.227

18 Is it possible for complex life to evolve on planets without oxygen? 2014-10-04T17:57:09.473

18 So we've survived the apocalypse. What's next? 2015-02-01T17:36:51.570

18 A World Without Bugs 2016-12-31T20:35:33.577

18 Can Deserts and Plainslands be geographically close? 2017-05-08T21:56:32.483

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

18 Can visible light be blocked while still allowing for light for plants to survive to pass through? 2018-05-14T04:56:32.523

18 How can a portal that connects two planets affect the environment? 2018-08-30T08:06:26.457

17 What would push a civilization to terraform a planet considering the complexity of this process? 2014-10-09T04:15:35.610

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

17 Retroactively modifying humans for Earth? 2019-08-26T00:17:55.423

16 Primary environmental concerns of a new coastal settlement 2014-09-17T15:01:58.787

16 How to cause an exodus from the west coast of the United States inland? 2016-04-13T12:57:05.833

16 How large can an Earth species be in 2016 without being discovered? 2016-11-17T04:47:39.040

16 Is a world with two different types of air possible? 2016-11-18T15:32:26.750

16 World Map - How can I tell if the Ecosystems are realistic? 2017-06-06T01:28:41.670

16 What would produce the most uneven but earthlike planetary surface? 2017-10-09T16:08:06.057

16 How can I figure out the territorial needs for my Werewolves? 2018-01-24T14:28:30.350

15 Planet with dual core 2014-11-05T23:05:00.827

15 What are the most important raw resources for a human colony? 2015-05-18T13:37:58.927

15 How can I tell I've travelled 20 million years into the future? 2017-10-13T22:21:35.583

15 Under what pressure/temperature conditions could ammonia or hydrogen fluoride play the role of water in an alien ecosystem? 2018-06-25T16:08:40.490

15 How can a nation of amazons avoid being invaded by their neighbors? 2018-09-30T00:40:30.553

15 Could a Weapon of Mass Destruction, targeting only humans, be developed? 2019-06-24T19:13:47.023