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

91 If the Romans found one working steam engine would they have been able to copy and use it? 2017-11-20T17:07:06.473

71 How could an ancient race warn the future in a universally understandable way? 2018-02-27T23:22:29.980

66 What modern technology would be most revolutionary to ancient Greeks? 2016-07-19T01:08:58.003

51 How to completely destroy a city, without leaving clues for humanity 4,000 years later? 2018-04-04T09:28:56.917

45 What are some tactics for the ancient Greeks to defeat alien invaders? 2015-06-10T00:06:56.910

44 Suitable jobs in Ancient Rome for time travelers 2017-04-28T04:36:34.573

39 What difficulty would the Roman Empire have besieging a fantasy kingdom's 49 m wall? 2016-11-15T15:05:37.640

38 How would someone destroy a dam in a world without explosives? 2017-04-22T22:06:10.250

36 How to stop a massive canal system from silting up? 2017-11-27T11:13:51.520

33 Could the Romans have colonised the New World? 2017-09-17T17:52:29.043

28 Could the Tower of Babel actually stand? 2017-12-24T14:34:43.620

27 How would the constant presence of an affable, undemanding immortal affect a society? 2015-04-06T02:07:30.617

27 How would a primitive society react to a cataclysmic event that disproves their beliefs? 2017-01-26T08:13:04.900

27 Is it possible for an ancient contraption to survive modern-day attempts of breaking in? 2018-08-18T19:54:09.830

26 How do you layer history? 2015-01-06T20:49:26.117

26 Zombie perpetual motion machines 2015-03-24T17:38:14.523

26 How do I make an ancient culture without borrowing from known ancient cultures? 2018-07-11T17:15:40.967

23 What would the Ancient Greeks call a wizard that can control life? 2017-08-23T08:08:10.990

22 How can I prevent an oracle who can see into the past from knowing everything that has happened? 2019-02-23T12:27:51.917

19 What is the oldest a cave could possibly be? 2017-03-21T16:24:55.760

17 How could 1BC Earth speed up communication across vast distances? 2015-12-19T03:02:18.183

17 Ancient-Roman-type Postal Service with Rats as Couriers 2019-01-29T17:47:03.567

16 Behaviour of Roman army versus zombie horde 2015-04-17T22:49:08.733

15 What would we see of a devastating interstellar war between alien civilizations within 1000 Ly? 2015-09-16T00:08:23.617

15 Tallest building possible by the Roman Empire 2017-04-12T18:19:19.007

15 Would a Roman civilization be willing and capable of building large scale sea defences against a serious but unrealised flood threat? 2017-10-18T19:29:14.047

15 What tool would a Roman-age civilization have for the breaking of silver and other metals into dust? 2019-04-09T10:24:29.267

14 Ancient culture which has been visited by aliens 2014-11-11T11:18:15.043

14 Julius Caesar with a one-time pad 2018-03-20T03:39:43.453

14 How would a time traveller conquer the ancient world? 2018-09-06T07:53:16.417

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

12 What consequences would ancestral guidance have? 2015-02-09T19:15:11.107

12 Zombie perpetual machines - logistics 2015-03-24T18:03:48.793

12 Present time travelers in bronze age - how much could they boost technological development? 2016-05-20T18:57:07.930

12 Naval warfare in a Bronze Age setting - few big ships versus many smaller ships 2018-10-18T02:20:46.333

12 What are the steps to making pantheons? 2019-03-29T04:19:08.430

11 Why would the Old Gods retreat? 2015-06-08T22:54:18.417

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

11 How can my ancient Roman civilization develop effective steam power for use in ships? 2017-11-16T19:59:29.827

11 Preventing the spread of Christianity in the Roman Empire 2018-08-11T07:09:18.097

11 What stops a race of giants from wiping out humanity? 2019-02-02T11:42:34.157

11 Blindfold battle as a gladiatorial spectacle - what are the tactics and communication methods? 2019-02-28T22:05:49.180

11 The North Star in the ancient world sky 2019-08-01T16:28:21.253

10 The Rollercoasters of Ancient Egypt 2015-07-20T23:10:01.997

10 Would a species that migrates across the globe discover its roundness sooner? 2017-07-08T05:46:13.400

10 Romans in the air 2017-12-24T03:49:05.237

10 What would change a human society's chronotype? 2018-02-02T02:30:38.170

10 How could a triumvirate remain stable as a political entity over the long term? 2018-12-26T15:39:52.597

9 Could marble sized bombs which detonate on impact (launched with slings) replace muskets in warfare? 2018-04-14T05:05:32.103

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

8 What effect would a known but lost precursor civilization have on religion and philosophy? 2016-02-08T22:20:52.657

8 Survival strategy for a time traveller in the Roman empire 2018-07-28T12:13:59.263

8 Could the Library of Alexandria have survived until today? 2018-08-23T13:42:41.863

7 Ancient divers of Rome 2015-03-23T23:39:18.323

7 Earlier Greek fire 2015-03-24T02:34:12.167

7 Creating a Classical civilization 2016-04-01T18:31:18.753

7 How to build the largest possible zeppelin with ancient tech? 2017-04-29T21:12:03.997

7 How to determine the population size and spread in a fictional ancient world settling 2017-11-11T13:42:43.667

7 Iron-age tools, is there a way to extract heavy metals out of a creature? 2019-09-30T12:23:05.083

6 Roman ancient balloons 2015-03-24T00:57:11.483

6 What would the ancient Greeks make of time travelers? 2015-10-28T00:09:25.333

6 A Civilization is not a Civilization Without Toilet Paper 2015-10-31T00:49:23.277

6 How would Zeus throw thunderbolts if Zeus were actually using technology? 2017-06-21T18:29:17.950

6 At what point in history would it be feasible to build Archimedes famous Death Ray? 2018-04-18T16:56:20.497

6 How far can civilization go without inventing the calendar? 2018-08-11T12:28:58.443

5 How could an ancient empire financially support a long-term conquest without plundering? 2015-02-25T00:17:17.467

5 Ancient Roman telegraph 2015-03-23T23:45:59.163

5 How would a person with modern knowledge of chemistry and medicine fare in Ancient times? 2015-04-07T00:47:29.663

5 Roman bike charge 2015-07-01T03:12:01.760

5 Logical coherence of my magic system 2016-06-10T18:03:40.807

5 How to design puzzles for an ancient period in Earth history? 2016-10-25T22:42:53.527

5 How might a game have made its way from China or India to the Mediterranean in the ancient world? 2017-07-17T22:13:16.337

5 What methods might an ancient civilization take to extract fresh water from great depth? 2017-10-28T08:16:37.380

5 Armor increasing strength 2018-03-18T11:17:48.287

5 Could an ancient civilisation create plastic on Titan? 2018-04-01T14:04:39.373

5 Historical or mythological Monster Hunter organization 2018-09-30T11:03:57.500

5 A Roman-technology clock run by slaves - how to make it accurate 2019-01-03T15:22:26.600

5 How can I use the promise of immortal life to sustain and stablize an undead empire? 2019-01-30T22:16:28.717

5 Weapons for Bio-Electric creatures 2019-02-08T11:04:11.860

5 How fast could a Byzantine messenger travel circa 300AD? 2019-05-02T20:24:21.403

4 Ancient tanks of war - Steam powered 2015-03-23T16:44:15.387

4 Adding Patent Law to Ancient Rome 2015-03-24T14:46:16.887

4 Culturally Correct Choosing a Location 2015-09-15T17:35:28.470

4 Can We Build Noah's ark? 2015-10-20T00:08:50.513

4 building a pyramid with upgraded ancient Egyptian tech 2016-01-24T11:02:50.727

4 Comet Hale-Bopp is the herald of new ages of Humanity 2016-04-08T18:01:14.657

4 If Jesus had children, how would the early world treat his kids? 2016-08-12T13:48:36.917

4 How would early and unlimited access to gunpowder change bronze age warfare and technology? 2017-04-27T00:07:04.187

4 Changing Earth's axis suddenly or gradually? 2018-07-19T06:19:43.903

4 Who gets to sleep in the palace? 2018-08-30T01:21:44.137

4 Having a Castle before they are invented? 2019-04-01T01:49:08.663

4 Can Roman-age tech break up harder metals? 2019-04-11T11:34:47.277

4 What weapons could an Iron Age society wield that would be effective against Medieval (High Period) knights? 2019-06-21T21:59:38.817

4 How would a low-tech device be able to alert its user? 2019-08-25T22:53:57.083

3 Would a time traveler to the Bronze Age need to worry about disease? 2015-10-09T00:12:26.493

3 Where did the "paler skin means higher status" concept originate? And approximately when? 2016-11-17T12:13:24.113

3 What is the longest something could hibernate? 2017-04-15T01:10:18.993