51 How to completely destroy a city, without leaving clues for humanity 4,000 years later? 2018-04-04T09:28:56.917
42 What would World War I outcomes be if the Tunguska event had occurred over London in 1908? 2014-10-15T09:55:01.910
32 What would make the internet go away? 2019-11-04T17:07:16.850
31 What would be the consequences for Earth if the moon disappeared? 2015-04-20T05:00:16.020
23 How big a black hole is needed for this story? 2015-04-17T05:39:38.423
20 A few dozen Millennia after Yellowstone erupts, how close would a parking lot look to a natural Iron Vein? 2017-04-10T15:25:01.233
19 Making doomsayers right - a moon(s), planet alignment that matters 2015-09-29T19:14:15.823
18 What would Earth be like right now without the Black Death? 2014-10-22T09:50:11.947
17 What would be the immediate climatic effects of having a continent appear out of nowhere? 2016-12-31T07:15:33.330
14 How close must a supernova be to severely harm the Earth? 2014-11-04T16:07:30.047
14 What could explain why trees only have 12 rings? 2018-08-13T21:27:36.057
13 Does the sun being blocked affect electricity? 2014-11-11T19:58:34.577
13 How many "years without a summer" can society survive? 2017-04-13T12:52:30.813
13 An Inverse Great Dying 2018-08-06T00:41:01.990
12 What did the night sky look like 63 million years ago? 2015-04-09T05:43:18.997
12 Would an asteroid of similar size to the one that hit 65 million years ago cause humans to go extinct? 2017-10-20T17:17:58.583
11 A giant meteor, balancing destruction and life sustainability 2014-10-01T19:48:20.100
11 Where would an asteroid have to hit earth to cause an impact winter? 2014-10-09T21:19:52.143
11 Political and social rammifcations of govenor killing most citizens to save the remaining few (second draft) 2015-10-13T15:52:58.030
11 What would be the effect(s) of this asteroid? 2019-12-19T17:55:35.380
10 How to prepare for a huge asteroid strike? 2015-06-28T15:57:50.407
10 Geopolitical and Economic Implications of a Large Eruption at Yellowstone 2016-08-22T14:14:39.273
10 How to transport 10,000 terrestrial trolls across ocean fast? 2019-02-22T03:31:29.030
9 What if the asteroid never hit? 2014-12-01T06:09:31.583
9 What part of the coast gets hit by the tsunami? 2016-06-09T21:36:53.700
9 Could a nuclear explosion occur naturally on a planet with crazy enough (but still possible) conditions? 2018-04-04T18:48:44.453
9 Can I trigger supernova artificially? 2018-07-05T15:20:58.037
9 To Conquer the Earth by Appearing Ship 2018-08-06T16:28:24.873
9 How possible would it be for a whole city (and smaller towns) to be built on water? 2018-10-21T14:21:13.333
8 'Magic Came Back' Catastrophes - Wood-based Disasters 2014-10-17T15:14:44.353
8 What would life be like on the remnants of a shattered planet? 2016-02-02T02:56:48.213
8 What kind of natural disaster could create a permanent, global cloud cover? 2018-01-15T23:03:25.023
8 What would an asteroid impact feel like to someone standing on the moon? 2019-10-21T18:00:04.493
7 Is it possible for coronal mass ejections or perhaps a gamma ray burst to cause firestorms on an earth-like planet? 2016-05-31T20:08:05.943
7 How can I catch an asteroid? 2016-06-28T18:34:27.980
7 How to wipe out ALL life on Earth, but leave it habitable? 2018-08-25T18:51:54.687
7 Can reckless idiots wake up a dormant volcano using mining equipment? 2019-01-31T09:55:50.227
6 Is it possible to harness energy from natural disasters? 2015-03-29T08:55:45.327
6 What factors could delay the rescue of a small group of survivors on a Pacific volcanic eruption? 2015-04-07T17:37:01.433
6 How to build a tsunami proof island city? 2015-04-12T22:52:22.380
6 Missouri Flood, 2011--FULL POWER 2016-12-19T20:42:37.200
6 What type of natural or artificial disaster could devastate a multi galactic civilization? 2019-05-10T04:49:18.223
6 Can Shade Balls be used to stop hurricanes? 2019-10-18T20:42:16.030
5 What would the impact of dramatic drop in temperature due to an asteroid strike be? 2015-02-13T09:10:30.837
5 Life on planet regularly hit with meteorites 2017-03-23T01:39:55.627
5 What natural event could strip all of Earth atmosphere? 2018-12-05T09:58:10.593
5 What is the longest plausible interval for a recurring, society-shaping, natural distaster? 2019-10-09T02:17:07.103
5 What disaster could wipe out civilisation worldwide, but allow for immediate rebuilding? What would be the side effects? 2019-10-17T12:55:27.463
4 'Magic Came Back' catastrophes - Fire-based Disasters 2014-10-17T15:09:00.357
4 'Magic Came Back' catastrophes - Water-based Disasters 2014-10-17T15:11:36.990
4 'Magic Came Back' Catastrophes - Air and Earth 2014-10-17T15:16:19.780
4 What would happen if a major city flooded? 2015-09-10T02:02:14.113
4 Underground City scenario: Unpredicted earthquake 2016-10-01T14:15:04.753
4 How could a triggered earthquake be stopped? 2017-03-19T19:02:19.027
4 Extinction Equilibrium: 50% 2018-08-13T14:24:23.043
4 A Dozen Cubic Miles of Volcanic Ash--How Big Would the Cloud Be? 2019-05-22T23:46:35.023
4 What would it look like if a portal opened to a dimension with drastically less energy? 2019-08-19T01:51:40.923
4 Can We Prevent an Impact Winter Extinction with Modern Technology? 2019-09-25T21:37:24.430
4 Is there any way for humanity to cope with perpetual acid rains? 2019-12-27T08:27:34.030
4 What do you call a society after it collapses to a certain degree? 2020-02-20T18:32:34.560
3 How should I introduce heavier elements on this world? 2015-06-06T09:32:38.537
3 Results of Pangaea 2015-11-22T04:43:31.290
3 What happens if the sun no longer emits visible spectrum? 2016-01-30T11:56:00.410
3 What could totally submerge a city without causing too much damage? 2016-04-13T19:23:04.453
3 How does the UK government react to a worldwide supernatural event? 2016-04-28T19:37:21.257
3 Likely warning time for extinction event asteroid 2018-02-04T23:01:49.130
3 Human caused disasters creating a whole new continent 2019-01-19T20:28:08.717
3 Floor is lava, need answer 2019-12-28T01:40:13.707
2 How can Earth prepare for hyper velocity black hole? 2015-07-17T08:06:38.660
2 The Sewers—300 Feet Down 2016-08-09T03:39:58.560
2 What noticeable impacts on a human body if every ocean turns into dead sea? 2016-09-30T13:06:58.243
2 How can an entire kingdom be removed from the middle of a continent? 2016-10-12T01:58:16.293
2 Recipe For the 300-Mile Wide Crater 2017-02-13T20:36:17.037
2 What would be the most likely cause of a major flood in London and what would the effect be to buildings? 2017-02-14T10:38:47.597
2 Defending against 100-year flood 2017-08-25T05:27:42.297
2 Effects of asteroid passing very close to the planet 2018-06-20T20:59:04.997
2 High-Altitude Asteroid Impact 2019-02-21T01:35:58.207
2 How big would an asteroid have to be to destroy 99.9% of the human population? How would the remaining survive? 2019-09-17T04:02:26.313
2 How long until land life can return after the impact? 2019-11-15T02:57:33.800
2 Can Florida become an island? 2020-02-14T11:37:22.203
1 In this scenario, which natural disaster is more likely? 2016-01-04T02:29:45.863
1 History Rewritten...By Katla Volcano 2016-01-17T20:39:01.363
1 Problems with floods and droughts 2016-01-19T22:41:46.893
1 How to explain perpetual earthquake magnitude at least 5 on Richter scale? 2016-03-03T08:01:14.297
1 How to naturally maintain a Earth-sized Planetary Ring System and the possible periodic bombardment that can ensue? 2016-06-19T00:57:47.820
1 Is it possible for a planet the size of Uranus to skim Saturn without colliding? 2016-08-18T19:18:54.597
1 How quickly could a major city disappear off the face of the Earth? 2016-10-25T03:31:16.213
1 Effect of asteroid impacts on Earth 2017-03-09T13:27:20.100
1 If there were giant irregular mirrors above cities that would reflect sunlight, would that heat the atmosphere and cause global warming? 2018-02-14T07:23:55.633
1 How long would it take for an Earth-like planet to flood? 2018-09-19T07:52:44.250
1 How would constant rhythmic tsunamis affect the coast lines of the Atlantic Ocean? 2018-12-29T16:44:13.663
1 A fast apocalypse with survivors, but very low chance of rebuilding 2019-04-05T13:41:00.463
1 Can we move the moon to use as a shield? 2019-08-01T21:10:27.873
1 What Kind of Bolide Would Chicxulub Be to Create the Bigger Airburst--Asteroid or Comet? 2020-02-03T00:20:24.810
1 How to evacuate an entire planet? 2020-02-14T15:37:39.680
1 Attempting to Cripple Society while Preserving Biosphere 2020-02-16T16:13:12.430
0 How to evacuate large parties of people from urban areas into safe zones within a reasonable amount of time? 2016-05-18T14:04:25.290
0 Do different angles of strike affect the destructive power of an asteroid? 2018-02-04T20:08:48.273
0 What would we need to have 1km deep fissures spanning out across the planet? 2019-12-21T02:25:51.293