130 How do Glass Ants create their tunnels? 2017-03-01T10:09:04.990

70 Is it possible to make an alloy that melts at low temperatures and solidifies at high temperatures? 2017-01-16T14:27:55.573

64 Would a full body diamond armor and sword guarantee survival and victory against a medieval battalion? 2016-09-06T09:38:04.613

55 Building a bridge to the stars 2016-01-26T12:41:57.677

54 The 10,000 year skyscraper 2016-10-31T23:47:57.520

50 Build an impregnable fortress in the middle ages with modern technology 2018-10-10T09:11:57.630

47 What would be best way to re-melt Mars' mantle and core to revive its magnetosphere 2015-01-16T17:43:16.570

45 Can coins be made out of concrete or cement? 2018-08-28T19:54:10.533

43 City made of glass in a desert? 2019-01-21T22:01:27.033

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

39 Given an "indestructible" material used for armor - what are ways to explain that material not being used as a weapon as well? 2016-01-08T19:36:21.503

39 What is the highest level of accuracy in motion control a Victorian society could achieve? 2019-07-03T08:41:41.797

36 How to sabotage a blacksmith production? 2019-01-10T04:06:38.853

35 Weaponry made from extreme light-weight steel: swords and daggers 2018-07-04T14:59:45.353

34 Is diamond armor better than traditional armor? 2016-04-22T15:59:58.957

32 What would be the ideal melee weapon made of "Phase Metal"? 2019-07-10T22:03:49.647

31 How to make female breast armor viable? 2018-12-14T13:49:35.950

30 Are there any structural materials suitable for production underwater? 2018-04-18T09:47:13.520

30 What do you make bricks out of in the rainforest? 2018-09-05T12:10:03.020

29 Can a generation ship withstand its own oxygen and daily wear for many thousands of years? 2019-05-16T05:52:34.317

28 What is the hardest wood possible, and where would this be a practical material? 2017-02-27T01:20:41.253

28 How high can Ludicrous Leg man jump? 2017-12-08T12:34:41.890

26 Is there a material or method to allow "swimmable" coins? 2019-12-05T22:26:39.597

24 What are some plausible super materials? 2015-11-15T03:54:06.453

24 Fabric in a waterless world 2017-03-02T15:10:41.410

24 What kinds of remnants might be evidence of a previous civilisation? 2017-08-22T02:24:15.487

24 What wearable material do I need to survive a pyroclastic flow? 2017-11-09T16:49:21.000

24 How durable would a person need to be to survive impact at terminal velocity? 2019-01-21T01:32:04.530

23 Super metal and the construction of knight armor 2017-05-23T17:58:31.433

23 A steel-cutting sword? 2019-05-23T02:49:08.953

22 How would aluminium work as medieval armor? 2016-09-01T12:02:33.987

22 Indestructible silk: good armor? 2018-08-23T16:35:03.970

21 Kidnapping Fire-Slugs 2018-07-30T13:58:02.463

21 Looking for a soft substance that doesn't dissolve underwater 2019-05-23T21:36:00.303

20 Other, non-synthetic materials for drum heads besides animal skins 2017-03-29T05:46:12.983

20 Does adamantium solve the giant mecha problem? 2019-12-18T20:03:20.677

18 A Non-Iron Elvish Steel 2017-06-26T23:54:30.637

18 What would be the effect of magic ultraviolet rocks on developing societies? 2018-05-23T16:36:47.240

18 Identifying extra-galactic artifacts 2018-05-28T00:09:21.577

17 What kind of materials can survive for millennia? 2016-07-13T08:42:25.300

16 Feasibility of organisms with translucent upper craniums 2018-03-20T13:56:49.483

16 Lifespan of abandoned buildings 2018-12-20T14:31:06.483

16 Reasons a fictitious metal is really hard to refine? 2020-01-22T11:30:17.183

15 Would it be possible to make a water mill without metal? 2018-06-27T15:36:56.387

14 Alternative skeleton material for an Earth-like planet 2018-06-28T10:42:20.770

14 Cremated People Pottery 2019-06-13T19:13:47.750

14 Can Papyrus be folded? 2019-07-30T10:28:38.760

14 How to ride a fish? 2019-10-01T14:16:44.300

13 Can porcelain be "reforged"? 2017-09-04T01:26:37.620

13 A ribcage capable of surviving the bite of a Tyrannosaurus Rex 2018-01-30T10:15:50.717

13 Would it be possible to create a spandex looking suit that at the same time offers physical protection? 2019-04-04T15:28:04.993

12 Weather and temperature effects on leather armor 2015-10-11T15:20:54.977

12 Could a pearl make a good bullet? 2018-03-24T22:21:12.810

12 Would it make any difference If I use diamonds as arrowheads? 2018-07-10T20:38:50.817

12 Is it possible to build an escalator without iron, with 16th century technology? 2019-10-22T19:04:17.577

11 What is the largest / longest practical bronze age sword possible? 2017-09-15T11:18:06.607

11 Best material for windsilk 2018-06-05T13:58:52.763

11 Wading through high-inertia particulates: how could pre-modern technology best approximate a protective, slick, waterproof suit? 2018-07-22T00:37:43.803

11 Paper from human skin 2018-09-03T17:21:14.413

11 Degradable ammunition for electro magnetic guns 2019-03-02T22:05:33.907

11 Is a diamond sword feasible? 2019-05-10T15:10:20.750

11 What would be the condition of a wood cottage that has been abandoned for ~20 years? 2019-09-24T02:14:30.027

10 What metals will a culture most likely use if use of iron is prohibited? 2017-03-25T13:40:41.837

10 What material should be used for a spaceship that doesn't need to re-enter? 2017-08-26T15:17:42.407

10 Is it possible to make pulleys and cams required for compound crossbows with medieval or early renaissance technology? 2018-05-03T20:49:18.560

10 How would a century of disuse affect this structure? 2018-09-04T07:21:55.833

10 Could we use both speed and heat to penetrate Europa's ice? 2019-01-22T22:31:49.797

10 Natural Armour and Weapons 2019-05-21T21:51:38.603

10 In an interstellar/interplanetary civilization, which would be most common/cheapest in the market: Plastic or metals? 2019-05-23T01:45:57.660

9 What substances would be really valuable if transmuting material printers would exist? 2016-04-14T10:28:55.527

9 How would plants develop and grow in a world where almost the entirety of the surface is stone? 2017-04-29T21:35:46.047

9 Silica Aerogel maze 2017-06-20T07:33:52.367

9 Harpoons... in space! 2018-01-31T16:42:26.490

9 Floor Material: What would mer-society like to use for comfortable floors? 2018-05-21T14:44:10.680

9 How early can transparent glass windows be easily available? 2018-08-15T15:32:07.327

9 Ancient Roman Pneumatic tube Postal Service 2019-01-31T01:33:07.983

9 Is it possible to make Asteroid Concrete? 2019-02-15T16:26:23.890

9 Is 'Black' Whitewash Possible? 2019-04-24T14:43:46.837

9 Pre-plastic human skin alternative 2019-04-26T12:34:32.697

9 What are some of the expected properties of metallic glasses and some steps to create them? (Explain Like I'm 10) 2019-06-11T18:27:51.090

9 Is it possible to surf on molasses? 2019-10-26T04:56:22.083

9 Substance that changes quickly from liquid/gelatinous to solid? 2020-01-07T12:08:23.403

8 Time Resistance 2016-02-27T15:24:41.913

8 How to render much of a world's metal unusable? 2016-03-06T04:56:39.267

8 What minerals and metals in particular were vital to the development of early civilization? 2016-03-07T19:31:35.583

8 Glass Vs. Transparent Aluminum 2016-07-10T03:53:39.950

8 What density can I set for Uium, to be reshaped by moon-mass black/white holes 2016-12-20T09:07:05.640

8 Sword that is limp when in sheath, and hard when drawn? 2019-11-22T02:09:56.960

7 How could iron artifacts last for centuries? 2016-03-28T07:48:23.570

7 Is it possible to build long-lived macro-scale structures out of non-atomic substances? 2016-05-02T22:21:33.430

7 How to conceptually explain use of a single substance to augment and dissipate magic? 2017-11-29T11:35:32.417

7 What are some existing or theoretically possible strong but lightweight armors? 2018-01-05T02:22:01.687

7 What materials would we need to have melee weapons and body armor become the norm? 2018-04-19T17:52:03.493

7 Unearthing a landfill 50-100 years later 2019-03-05T21:03:38.763

7 Can you replace goethite with something else in limpet teeth to decrease its density and maintain its strength? 2019-11-11T20:02:21.957

6 How fast can heat be carried away from a small source? 2016-12-10T17:39:44.213

6 What hull materials are suitable for a helium-sea jet-ski? 2017-02-10T10:19:08.413

6 Rhino Horn in a Composite Bow? 2017-03-08T16:31:55.580

6 Super metal and the construction of knight weapons 2017-05-25T18:54:33.783