132 What is the minimum human population necessary for a sustainable colony? 2014-09-16T18:28:12.400

129 What could people notice about someone who is two times as dense as a regular person? 2018-06-09T20:44:39.247

120 How can a Dragon keep humanity in check? 2018-01-16T00:02:51.453

118 Why would characters spend time answering imaginary questions to fictional hypotheticals? 2018-10-02T18:38:06.547

108 How many humans can I abduct without getting noticed? 2015-08-22T07:00:35.783

74 How does the government cover up alien crash landings? 2015-08-26T10:30:05.320

73 If the insects declared war, who would win? 2015-08-16T22:14:41.267

67 Why Would Aliens Enslave Humans? 2017-04-11T23:06:41.573

63 What is the minimum radius of a circular corridor for the walls to appear straight? 2017-04-06T07:24:50.847

61 How can humans coexist with an intelligent carnivorous species? 2016-08-13T19:50:28.057

59 What is the least expensive way to annihilate humanity? 2015-04-08T21:46:36.717

58 Would the human body support living on planets with a greater gravity than Earth? 2014-09-17T11:45:05.767

56 Could a joke be funny enough to kill? 2017-05-30T18:13:46.770

54 Is roof-hopping through a city realistic? 2016-08-29T12:18:52.400

54 Reasons why healthy people would intentionally want to get infected? 2017-09-17T08:51:39.123

54 Why zero tolerance on nudity in space? 2019-02-26T03:58:37.270

54 How can an organ that provides biological immortality be unable to regenerate? 2019-03-17T18:23:40.763

52 If we put humans on planets with atmospheres different from Earth's atmosphere, but still containing oxygen, would humans be able to breathe? 2015-02-17T18:24:44.640

52 How would humans adapt if low-wage labor was done by robots? 2016-08-12T11:05:48.493

51 If an FTL spacecraft entered Earth orbit, how long would it take for humans to build a FTL spacecraft? 2016-02-16T18:14:44.363

51 How long would it take to “domesticate” humans? 2017-12-10T14:22:15.313

50 How long would people live in the US if an immortality treatment was available? 2014-12-14T16:30:26.327

49 How to conceal my immortality without hiding for a hundred years? 2017-03-23T09:28:52.717

48 How would a Martian colony be able to celebrate Christmas? 2014-12-04T15:01:54.587

47 How early was the Earth liveable for today's humans? 2014-11-16T21:05:26.967

47 If accelerated natural healing were to occur, what would happen to the human body? 2014-11-20T20:38:09.393

47 How do I explain that an interstellar spaceship still requires risky spacewalks? 2017-10-17T13:46:51.070

46 How can I make humans NOT WANT to investigate how a supernatural ability works in an intelligent, non-human creature? 2015-05-27T21:08:21.247

46 Where on Earth is it easiest to survive in the wilderness? 2019-09-03T23:01:44.457

45 A pill to make you think faster: Side effects? 2015-03-14T11:17:40.000

45 A person with no magic in a magic dependent world 2016-05-09T12:49:45.260

45 Could humanity survive if all except a few males died in a plague? 2016-06-09T11:14:35.553

45 How many people would have to be killed to make the streets 'run red with blood'? 2017-04-19T20:17:36.810

45 Is it harder for an intelligent octopus to live on land, or a human to live in space? 2019-01-15T22:14:18.237

45 What is my malfunctioning AI harvesting from humans? 2019-08-09T22:34:43.580

44 What were the machines really doing with humans in the Matrix? 2015-09-30T09:46:38.157

44 Would the principles of Stack Exchange work in a real-world utopia? 2017-09-06T13:51:57.990

43 Would a horse be sufficient buffer to prevent injury when falling from a great height? 2019-09-24T02:44:15.510

42 What happens to a human who receives more information than the brain can process? 2014-10-19T12:10:48.827

41 Could you do acrobatics and long-distance running in an ankle-length dress? 2018-12-05T16:27:54.313

40 How would a human livestock facility run by aliens operate? 2015-10-01T16:13:11.400

40 Cartoon vs Real Life Bores?---(Pointy vs Flat kind) 2017-01-24T13:06:55.217

39 The world is ending, how to convince/force chosen ones to come quietly? 2016-01-04T16:31:22.750

39 How long would human immunity last in space? 2016-12-13T14:39:03.117

39 Scientific/biological basis of someone with unlimited willpower? 2018-11-07T15:03:44.617

38 How to modify the human eye to see into the ultraviolet and infrared bands? 2015-11-12T19:58:19.657

36 How long would it take for a new intelligent species to evolve if humans disappeared? 2014-10-31T09:00:18.737

36 No newborns on Earth. How much time to find a cure? 2015-09-25T16:47:25.120

36 Would humans be able to derive nutrition from foodstuffs found on alien planets? 2016-07-19T18:15:31.977

36 With some exceptions, what makes the most powerful mage on the planet, not kill a merchant and steal his goods? 2017-09-13T08:48:41.630

35 How will survivors of a global plague find each other? 2014-11-07T03:44:49.470

35 How will our world change if all men suddenly die? 2016-03-15T09:47:08.157

35 How to tell a clone apart? 2016-09-22T05:47:33.220

35 How can I make sure there is only one direct descendent over a thousand years? 2017-04-30T18:40:26.787

34 What would be the effects on the human body if the oxygen level increased by a lot? 2014-11-25T11:19:32.380

34 Why are low gravity humans depicted as TALL? 2016-06-05T12:53:02.433

34 Should immortal women have periods? 2016-11-22T20:25:16.327

32 Humans can now fly. What new laws are created? 2016-03-23T16:39:04.467

32 Humans can now fly. What happens to the transportation industry? 2016-03-23T17:05:54.230

32 Teaching people not to ask gods for help 2016-04-05T13:26:37.767

32 Sure-fire way to identify an heir in a world without genetic testing 2017-10-09T02:40:37.840

31 What would be the consequences for Earth if the moon disappeared? 2015-04-20T05:00:16.020

31 How does an AI keep its Human Pets Happy? 2016-02-16T15:40:56.090

31 How do the zombies win when they're so weak? 2016-03-09T20:57:36.040

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 How could a human-descended race appear to be all-female? 2014-11-11T04:12:19.403

30 How inhuman can a human be? 2015-07-28T16:13:42.487

30 How old do surviving children need to be to keep human civilization from failing? 2018-08-30T23:18:24.470

30 Physiological effects of huge anime eyes 2019-03-31T17:23:23.827

30 Half of living beings in the universe die: Does society survive? 2019-05-13T08:28:33.023

29 Everyone now has two bodies: what do you do? 2015-08-03T18:22:48.837

29 What city and town structures are important in a low fantasy medieval world? 2019-05-17T09:08:08.603

28 Anatomically Correct Bio-fabricator 2016-02-12T16:10:30.700

28 How can I make my deteriorating world's society accept that only 1% (fairly chosen by the government) can have better living conditions? 2016-04-26T14:57:08.793

28 Plausible Original Concept For High-Fidelity Apocalypse? 2016-12-13T00:10:49.367

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

28 What Could Cause Humans To Fracture Into Many Multiple Species? 2017-10-21T23:27:15.883

27 How could immortal children age faster than immortal adults? 2017-01-29T22:33:12.890

27 How would industrial civilizations contacting each other for the first time protect themselves from diseases? 2017-12-12T19:17:47.200

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

27 Would one atom of antimatter be lethal if annihilated inside the brain? 2018-11-30T07:29:05.857

26 World where gender roles are swapped 2015-08-06T07:09:00.237

26 What kind of jewelry would be valuable in a world where anything can be produced? 2015-10-13T23:44:14.500

26 Can a human survive acceleration from 0 km/h to 310 km/h, and then back down to 0 km/h, all in 500 meters? 2017-08-04T11:56:59.873

25 How many human beings are/were there? 2016-08-11T07:10:37.960

25 Why do we keep smoking in distant future? 2016-12-17T17:46:57.167

25 Why would gods decide to teach people to not rely upon gods? 2017-03-12T22:32:17.697

25 5 million years in the future and Humans are still the same: how is that possible? 2017-12-30T18:45:11.993

25 What would happen to a human body subjected to extreme water pressure? 2018-12-17T17:42:03.937

25 How to check what is edible on an alien world? 2019-07-28T10:00:53.070

24 How would the human body develop under a different gravity? 2014-11-07T14:42:44.510

24 Why would the whole of mankind live in a single, gigantic city? 2017-02-05T16:02:36.377

24 Could a person scuba diving take off his air tank and use it to propel himself? 2018-06-19T18:43:42.223

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

23 Scientifically Plausible Reincarnation? 2014-10-17T13:38:27.653

23 Making the First contact 2014-12-20T20:30:02.740

23 How would society react if they found indisputable proof that the universe is a virtual reality? 2015-02-21T21:34:23.900

23 How (if at all) would being able to speak and listen simultaneously alter the structure and development of language? 2016-12-04T17:47:34.523

23 Would we notice ridiculously healthy birds? 2017-04-26T22:41:55.607