130 How do Glass Ants create their tunnels? 2017-03-01T10:09:04.990
72 Could aliens colonize Earth without realizing humans are people too? 2016-12-22T18:09:03.583
56 What kind of natural armor would stop bullets? 2017-10-30T18:54:54.720
51 How do I begin to explain that my orcs may survive by eating soil? 2017-08-08T01:35:31.447
48 Could a sedentary organism develop intelligence, or even sentience? 2017-10-25T13:45:42.393
46 Advantage of luminescent eggs? 2018-04-08T03:44:28.293
44 Is an organism with both animal-like traits and plant-like traits scientifically possible? 2017-07-14T23:11:43.103
44 How would a tripedal animal walk? 2018-07-23T17:17:50.977
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
36 Would humans be able to derive nutrition from foodstuffs found on alien planets? 2016-07-19T18:15:31.977
35 What sort of world would help prevent an intelligent species from discovering evolution? 2019-12-22T17:50:45.240
34 What would an efficient swimming creature in magma be like? 2017-06-24T08:29:57.827
31 Is there any real potential advantage to having two hearts? 2016-03-27T02:44:07.840
31 Is it a forgone conclusion that any exo-bacteria discovered on an alien, albeit Earth-like planet will be deadly to human life? 2016-08-05T17:31:57.133
31 Can a rational creature have a series of small brains instead of a large one? 2017-10-26T18:16:39.867
30 Non-aqueous eyes? 2019-06-05T20:10:10.610
29 How might a carnivorous species subsist on a cycle of cannibalism 2018-02-25T13:19:13.733
29 Can a planet harbor plants of different colors without one pigment outcompeting the others? 2018-06-24T10:23:12.410
28 A realistic explanation of a typical Plague-inc "infect everyone before you start killing them" strategy 2017-07-03T14:38:07.283
28 Elf-like race: What could prevent overpopulation? 2019-01-23T17:51:31.357
28 What clothes would flying-people wear? 2019-07-30T05:15:41.243
26 Could a species with a lifespan of 20 years achieve enough technological progress to reach space? 2018-10-22T12:13:36.073
25 Hydrogenenic Photosynthesis: Strategies for animals 2015-09-13T14:56:13.127
25 Plausible biological alternative for normal photosynthesis 2017-10-27T20:59:55.520
24 How to evolve biological radios? 2015-10-06T22:07:51.963
24 Reality Check: Are these Honey Mouths and Thorn Shredders realistic? 2018-02-07T07:34:37.770
24 What organs or modifications would be needed for a life biological creature not to require sleep? 2019-09-12T13:41:29.937
23 Life from a dead space whale 2016-12-07T11:10:44.043
22 Maximum size of an exoskeletal creature 2016-10-03T08:59:10.843
22 An animal that is physically separated into multiple parts 2018-11-16T17:36:12.970
21 How to become accustomed to an alien environment 2015-09-21T13:29:13.610
21 Other than tentacles and jointed digits, what methods of holding items are there that provide similar dexterity? 2018-08-12T00:46:25.690
21 How would photo IDs work for shapeshifters? 2019-04-08T03:30:39.483
20 Humanoids with digitigrade legs? 2016-04-24T02:52:32.897
20 Anatomically correct Arachne 2016-08-16T18:03:46.187
20 Psychological effects of non head-based killing techniques 2017-11-21T06:05:17.740
20 The Biological Dullahan 2018-01-04T10:19:35.563
20 Physiological adaptation of life on a planet orbiting a red giant. 2018-03-15T03:38:59.033
20 Aquatic aliens and the effects of acceleration in space-flight 2018-11-20T22:15:31.010
20 What could be the physiological mechanism for a biological Geiger counter? 2019-06-14T04:38:08.117
19 Would an alien lifeform be able to achieve space travel if lacking in vision? 2019-04-12T14:23:30.837
19 What would a life-form be like if it's antimatter-based 2019-11-03T00:47:30.490
18 How small can an organism get? 2016-02-22T20:13:57.277
18 Biological ''Helmet'' 2018-03-17T19:57:31.317
17 Alternatives to DNA 2016-02-18T02:02:27.817
17 How to make my Beast-Of-Burden work? 2016-09-23T08:34:04.767
17 Are "none-of-the-above" species classifications possible? 2016-11-25T05:11:37.307
17 Could a predatory semi-sentient species survive, in the long run, without the emotion of fear? 2018-05-02T13:46:35.253
17 Armor for Giant Crabs to Defeat Explosive Bites from Predators 2018-05-16T17:24:33.727
17 Swimming in space. What is the mechanism? 2018-11-13T18:11:00.357
17 Would carbon-based lifeforms be able to eat silicon-based lifeforms? 2019-01-05T16:35:05.263
17 What would a biological creature need in order to see into the future? 2019-09-03T00:15:55.907
16 How far could a planet be from its star and still be kept habitable by intense greenhouse gases? 2016-03-14T16:56:13.737
16 What else is involved in "silicon based" life? 2016-03-31T18:50:19.163
16 Plant based lifeforms: brain equivalent? 2016-10-17T08:19:56.663
16 Can a reproductive system that allows interspecies breeding be made believable? 2017-02-07T06:24:51.267
16 How would a microscopic organism create kilometre long fibre optic cables from ice 2017-08-24T13:29:17.000
16 Are there any natural forms of communication as robust as speech/vocalization? 2017-12-07T04:28:13.870
16 Living buildings 2018-03-17T12:45:13.677
16 Feasibility of organisms with translucent upper craniums 2018-03-20T13:56:49.483
15 What metal or compounds will make blood silver? 2015-12-21T04:52:37.877
15 Could complex, macroscopic life arise and exist without cells? 2016-02-03T05:33:57.440
15 Microbial Civilization Precursors 2016-02-12T14:57:42.653
15 Biophage: A creature that kills all other creatures 2016-03-10T03:42:57.737
15 Heterochiral biosphere: a two-handed world 2016-10-26T16:02:46.037
15 How would a free floating ecosystem on an ocean world function? 2018-04-09T09:43:41.450
15 How could an animal run fast using blade-like feet that sink into spongy ground? 2018-05-11T17:59:31.370
15 Sugar-bomb tree mechanics 2018-06-20T12:55:56.567
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 might kinetosynthesizing "plants" look? 2018-08-24T15:29:26.390
14 If every cell in a creature's body were replaced by a functionally identical nanobot, would the creature retain its consciousness? 2016-08-21T20:53:34.190
14 Is there any set of circumstances in which having 3 hearts in an organism would be beneficial in a species? 2017-02-03T16:51:40.067
14 Life without Nitrogen 2017-10-11T17:36:56.927
14 Are there physiological traits common to all tool-building species? 2017-12-29T05:32:25.247
14 Can a Prototaxite be used for a wood equivalent? 2018-03-06T05:02:21.970
14 Alternative skeleton material for an Earth-like planet 2018-06-28T10:42:20.770
14 How could an Earth-like planet develop huge pinkish-purple forests on ocean surfaces? 2018-08-08T21:54:53.293
14 What kind of planet could have giant sand worms? 2019-11-15T09:51:55.170
13 Xenotaxonomy: the Science of Categorizing Extraterrestrial Life 2015-09-21T14:36:59.677
13 Pharbohydrates vs Carbohydrates 2015-10-04T15:13:40.617
13 Anatomically correct Ent 2016-08-22T21:01:46.603
13 What types of technology would a sentient species without eyes develop to enable them to explore space? 2016-12-10T16:51:06.220
13 Can an Alien Breed With Earth Animals? 2017-10-28T16:16:09.783
13 What's a good jaw and tooth build to break armor? 2017-10-31T19:01:10.697
13 Would it be possible for a non-aquatic species to exhibit bioelectrogenesis? 2018-07-02T02:47:19.027
13 What are the benefits and disadvantages if a creature has multiple tails, e.g., Kyuubi or Nekomata? 2019-09-19T05:38:07.900
13 Could a creature carry its own biome and be self-sustaining? 2019-12-31T15:24:50.503
12 Can an entire ecosystem be one giant organism with distributed intelligence? 2016-12-06T21:23:20.387
12 How could a biological loudspeaker work and naturally evolve? 2017-04-14T16:43:04.900
12 Is it possible to have detachable natural armor? 2017-10-31T05:25:33.473
12 Which conditions would make aerial filter feeding successful? 2017-11-19T21:19:05.517
12 Could an organism see in infrared light as well as normal light, using its brain to process what it sees into a single image? 2018-03-16T13:54:29.597
12 What would be the psychological differences between a human and an intelligent detrivore? 2018-04-20T00:27:47.167
12 How to modify bee physiology to be able to produce firehoney given nectar that is (magically) flammable? 2018-06-04T00:01:06.473
12 Liquid nitrogen blood? 2018-07-02T03:56:11.350
12 What minerals that are more durable than calcium would be suitable for bones? 2019-04-30T02:32:58.103
12 How big can Europan fish get? 2020-01-16T21:42:23.247
12 Feasibility of flesh pillars 2020-01-26T01:17:39.407