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

149 Anatomically Correct Strange Women In Ponds Distributing Swords 2019-03-27T09:02:46.327

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

78 Tree Shape on a Tidally Locked World 2020-01-05T17:48:57.243

71 Anatomically correct "XKCDius lethalissimus" 2018-08-28T15:23:20.843

69 Designing an animal that wants to be eaten 2017-12-17T00:19:39.807

67 How often must carnivorous grassland eat? 2016-03-18T10:22:42.077

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

63 Physically, how do dragons grasp and *transport* the contents of their hoards? 2017-01-03T18:51:05.517

61 Why would two species of predator with the same prey cooperate? 2017-01-04T11:14:12.983

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

60 Justifying why a troll's skin would turn to stone in sunlight 2018-08-22T20:03:42.440

60 Anatomically correct metalhead, part 1 - headbanging 2018-11-19T16:46:29.790

59 What are the conditions in which a creature would evolve more than one brain? 2015-04-20T19:39:35.527

58 Why is this creature afraid of water but not of body or plant fluids? 2016-07-20T12:20:15.353

54 Why would merfolk have hair? 2016-05-31T02:15:10.650

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

53 How can a fish that explodes by itself prosper enough to reproduce on a grand enough scale to persist as a species? 2018-01-25T07:56:40.870

52 Shapes for an infinite animal? 2018-04-24T13:34:02.280

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 Why would an underwater creature remain lodged to its prey? 2016-05-31T06:30:21.007

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

47 Anatomically Correct Phoenix 2015-10-27T17:47:27.133

46 How do creatures with a hive mind communicate? 2014-09-24T06:57:57.117

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

44 How would a tripedal animal walk? 2018-07-23T17:17:50.977

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

43 How expressive is a color-based language? 2016-12-29T16:43:44.533

42 How do I prevent my turtle from collapsing under its own gravity? 2014-10-09T13:38:07.380

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

42 Why does my species tock like it ticks? 2016-12-29T15:22:40.167

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

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

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

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

38 Could a creature evolve a biological "bulletproof vest"? 2016-01-14T21:07:19.077

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

37 What kind of supernatural powers don't break the masquerade? 2016-12-04T13:49:17.940

37 Creature that swims in the solid ground 2017-08-13T20:23:11.703

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

37 Why do gargoyles have wings when they can't fly? 2020-02-24T13:46:55.067

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

35 Is it more likely that merfolk would evolve with horizontal or vertical tails? 2014-10-09T08:46:52.200

35 Why would the mouth of a creature evolve to be away from the head? 2015-10-22T18:09:55.137

35 Anatomically Correct Medusa 2016-01-25T20:50:39.513

34 An underwater creature that could take down a boat 2015-11-30T15:29:09.700

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

33 How could a species survive on just luring in and eating humans? 2016-06-03T00:19:37.657

33 How could polycephaly evolve as a byproduct of natural selection? 2018-02-08T00:31:52.947

33 How to defend when attacked by an avian species? 2018-11-05T15:14:43.460

32 Anatomically Correct Gods 2015-09-17T17:49:46.260

32 Can a dragon be electrocuted? 2017-02-09T01:12:51.543

32 Anatomically Correct Succubus 2018-08-09T03:24:07.740

31 Evolution of species with separate sapient and non-sapient forms? 2015-02-12T04:59:55.727

31 Anatomically Correct Khajiit 2016-07-27T16:46:04.257

31 Plausibility of Floating Whales 2017-11-01T03:59:30.673

30 Can telepathy and telekinesis exist in biological creatures? 2015-03-19T16:11:11.913

30 Could a creature have eyes that change color based on their mood? 2017-02-12T13:09:10.660

30 Plausible reason for gold-digging ant 2019-02-24T19:39:25.143

29 Are hoofed bipeds feasible? 2016-05-28T17:26:56.520

29 Can a biological laser exist? 2016-10-18T21:08:44.380

29 What qualities could a hominid evolve to make it a better farmer? 2018-01-02T00:57:54.957

29 Psychedelic Death Birds 2018-03-05T02:18:24.057

29 Why do dragons like shiny stuff? 2019-08-04T22:12:01.873

28 How big could a living thing be? 2014-10-09T13:38:24.047

28 Asymmetrical animals 2015-03-10T13:01:21.030

28 How do I dehumanize a humanoid alien? 2016-12-25T08:49:36.550

28 Creating a living currency 2017-06-06T19:25:45.140

28 A realistic explanation of a typical Plague-inc "infect everyone before you start killing them" strategy 2017-07-03T14:38:07.283

28 Why would orcs have tusks? 2017-09-09T14:01:02.843

28 Side effects of having bulletproof skin? 2018-02-28T17:42:45.927

28 Biologically sound reason why underground dwelling Drow have dark skin? 2018-06-12T15:11:03.873

28 What clothes would flying-people wear? 2019-07-30T05:15:41.243

28 A fast aquatic predator with multiple eyes and pupils. Would these eyes be possible? 2019-10-06T04:28:35.683

27 Dragons that eat gems—digestion 2015-07-15T15:37:18.823

27 In a world without obstacles, would life evolve wheels? 2015-09-01T11:19:53.423

27 How realistic are living creatures whose skin burns when exposed to light? 2016-08-08T17:14:42.580

27 Living biological boats? (Jasconius) 2018-04-21T20:06:42.440

27 Viability of Fixed-Wing Biological Flying Creatures? 2018-06-25T23:21:31.800

27 If a person had control of every single cell of their body, would they be able to transform into another creature? 2019-05-25T15:09:28.920

26 How could ghosts be explained without an afterlife? 2015-01-23T01:24:05.270

26 Anatomically Correct Angels 2015-09-10T21:18:00.283

26 Anatomically correct multiarmed humanoids 2017-03-16T21:45:16.133

26 Creating wood actually as hard as granite 2017-05-05T12:51:51.503

26 How would you design a dragon-like creature so it could sew? 2017-12-26T03:44:29.943

26 How do I scientifically explain a specific type of wood piercing through armor when not even bullets can? 2018-12-27T15:45:25.703

25 Are dragons cold or warm blooded? 2014-09-22T10:19:19.477

25 Assistance to fight off a silicon-based lifeform 2014-10-07T17:28:04.753

25 Intelligent Cats With A Serious Attitude Problem 2015-03-10T00:20:02.500

25 Anatomically Correct Werewolves 2015-09-19T20:57:47.120

25 Anatomically Correct Cyclops 2015-11-20T19:17:22.880

25 How can I Determine the Litter Size of a Species? 2016-09-07T23:43:50.703

25 How do genetically modified rodents cause the apocalypse? 2018-04-23T17:36:15.677

25 Would this biological cooling system work? 2018-05-23T23:50:44.830