178 How could dragons be explained without magic? 2014-09-19T07:09:36.137

154 Can a substance be more lethal in smaller doses? 2018-05-27T19:06:41.377

135 Everything alive in the world dies this instant. Without bacteria to decompose anything, what happens to the remains? What does this look like? 2018-04-19T10:59:48.727

102 What mechanism can prevent super-healing heroes from accidentally budding? 2018-07-21T20:14:14.933

91 Why would vampires be incapable of entering a non-vampire human’s house uninvited? 2016-04-12T06:41:56.210

87 Is there a scientific explanation as to why aliens should look similar to us? 2014-09-28T13:46:22.090

87 Lembas bread (2000 Calories per bite) 2016-09-21T16:35:14.897

83 Would a 'World Tree' be feasible in real life? 2016-07-25T12:33:36.453

69 Can a human colony survive on a 'hot' world? 2019-12-10T11:26:55.980

65 Can you simply scale up animals? 2014-09-19T07:52:17.147

65 How would an astronaut conclude he's on Earth, but 600 million years in the future? 2017-06-17T00:07:44.217

61 How can waste from the body be removed without being expelled from the anus? 2018-09-10T12:38:48.777

60 Is Cancer Biologically Universal? 2016-06-28T18:21:08.283

60 How does the Booze-Rat fuel its defensive mechanism? 2016-09-27T07:46:17.840

59 A Bird that Never Touches Ground 2015-03-07T13:36:25.693

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

58 Does a grenade kill you the same way a gun does? 2019-02-01T14:21:17.283

56 How do you power all the nanobots? 2016-02-15T13:11:00.660

56 What kind of natural armor would stop bullets? 2017-10-30T18:54:54.720

54 Is a man-eating plant realistic? 2014-10-02T12:20:57.803

54 What could cause sugary rain? 2017-12-15T22:04:01.047

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

53 Lifeform - resistant to gunfire but vulnerable to melee 2015-03-26T11:07:44.347

52 Would charging unicorns survive the impact with a line of infantry? 2014-11-29T18:35:45.487

52 What possible scientific reasons could there be for a vampire to only be killable via wooden stake to the heart? 2017-08-25T08:35:01.403

50 What would a planet spinning fast enough to allow geostationary orbit near the surface look like? 2014-09-20T06:02:14.997

50 Could Cobalt bind to nitrogen the same way iron would to oxygen in an alien respiratory system? 2018-08-06T01:39:19.333

49 Poison which constantly needs to be treated by antidote to not get killed 2016-03-04T08:21:39.797

49 Could an organism have evolved to kill its prey by shouting at it? 2016-06-07T23:42:49.210

49 Anatomically correct sharknado shark 2018-09-20T14:17:00.560

48 Is there a maximum size an ocean bound creature could grow to? 2014-09-19T08:09:54.467

48 Natural Projectile Weapons 2014-09-26T12:32:56.580

48 Is it possible for a species to have more than two sexes? 2014-09-29T09:35:57.680

48 How could we time travel backwards without killing everyone with germs from the future? 2016-08-09T09:14:57.950

48 Given immortality can animals become intelligent? 2018-09-24T14:26:12.337

48 What injury would be of little consequence to a biped but terrible for a quadruped? 2019-03-11T17:07:56.080

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 What would be the possible benefits of pointed ears? 2017-09-13T17:46:13.023

46 Is it possible for two symbiotic lifeforms to be born from the same egg? 2017-08-21T10:34:37.860

46 Advantage of luminescent eggs? 2018-04-08T03:44:28.293

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

44 Is an organism with both animal-like traits and plant-like traits scientifically possible? 2017-07-14T23:11:43.103

44 How could elves survive without any fat cell in their body? 2018-10-31T06:30:40.230

43 Could a plant grow on a restrained, living human? 2017-06-20T13:14:15.443

43 For what reasons would an animal species NOT cross a *horizontal* land bridge? 2019-04-10T12:43:17.183

43 Is there an evolutionary advantage to having two heads? 2019-05-26T20:25:46.990

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

42 How could I scientifically explain ice breath? 2015-03-03T15:09:33.503

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

42 Why did dragons evolve to be smart? 2016-12-16T13:35:12.983

42 How do I explain a unicorn discharging powerful electricity at a distance? 2018-04-11T09:11:17.103

42 How to get cool night-vision without lame drawbacks? 2019-06-19T18:53:12.330

41 What could cause an avian species to become intelligent? 2014-10-23T13:08:03.367

41 Multiple DNA, one creature 2016-01-11T15:16:25.510

41 A three foot cell? 2016-02-18T15:57:37.897

41 Would armour made of spider silk work? 2016-06-28T14:28:14.793

40 How do centaurs get enough calories to live? 2015-01-06T10:33:20.027

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

40 What would justify hunting dragons that are made with real physics, with melee weapons? 2017-08-02T17:10:57.743

40 Make slimes great again, but how? 2018-11-14T11:45:38.493

40 Why can't my huge trees be chopped down? 2019-07-26T09:44:59.163

39 What effects would a change in the nature of human sexuality have on society and infrastructure 2014-09-17T09:09:48.007

39 What would a Giant’s voice be like? 2017-04-27T00:42:18.520

39 What could a reptilian race tell by candling their eggs? 2019-06-23T22:55:50.423

38 Why do only clothes stay in an animal transformation? 2015-10-26T22:23:08.127

38 What are the evolutionary benefits of mating for life, as opposed to serial monogamy? 2015-10-29T19:06:14.713

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

38 Would a sentient species be able to thrive when mating means the death of the male partner? 2016-05-06T01:08:26.250

38 Suppose the Orcs are mammals, why is their skin green? 2017-09-27T01:23:08.530

38 Would it be possible to have a GMO that produces chocolate? 2019-08-21T17:49:24.880

37 What would be the evolutionary advantage for plants to be bioluminescent? 2014-09-27T19:57:11.950

37 How would multi-race humanoid evolution happen? 2015-02-11T17:29:18.173

37 Are diamond berries possible? 2015-04-28T04:06:13.390

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

37 Anatomically Correct Carnivorous Tree 2019-05-11T10:32:01.990

37 How many generations would it take until the noble and peasant classes become different species and cannot interbreed? 2020-01-20T18:32:15.623

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

36 How to make a realistic 'giant' 2015-01-12T01:55:11.250

36 How can hornets be engineered to kill a human with a single sting? 2017-03-28T14:42:58.960

36 Plausible cause of a family only giving birth to females? 2018-06-06T04:31:03.000

35 Is it possible to genetically modify a being after birth? 2014-10-06T07:14:22.370

35 Can a human being live with a continuous stream of blood instead of pulses? 2016-08-26T09:58:10.520

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

35 Would a suit that acts as extra-cardiovascular system allow you to run indefinitely? 2017-01-03T16:53:53.020

35 Possible Long Term Effects of Frequent Teleportation 2017-06-27T18:46:35.590

35 Is there a liquid that could protect a human inside it from impact? 2018-04-16T20:23:48.677

35 What species should be used for storage of human minds? 2019-02-24T15:33:06.090

35 Best species to breed to intelligence 2019-05-08T05:29:50.167

35 What sort of world would help prevent an intelligent species from discovering evolution? 2019-12-22T17:50:45.240

34 How would society be different in a sentient species that does not care for its young? 2014-09-26T12:39:07.717

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 How would tattoos fare on reptilian scales? 2014-12-01T02:59:26.903

34 How do centaurs get enough oxygen to run 2015-01-06T10:34:51.110

34 Why would shapeshifters choose to keep an original form? 2016-05-01T18:00:24.653

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