96 How to survive the heat death of the universe? 2016-02-02T11:27:43.143

58 If every star in the universe except the Sun were destroyed, would we die? 2019-09-05T19:19:04.627

56 How soon can the first stars form? 2019-05-01T14:10:07.683

51 Implications of Newtonian universe 2016-03-24T10:04:34.723

47 What if we lived near a boundary of the universe? 2015-12-06T20:24:45.817

42 How to prove that the solar system isn't inside of a localized physics bubble? 2017-03-13T23:35:32.193

31 How to detect that the universe got mirrored? 2019-01-08T10:07:44.217

30 What does it actually mean to have two time dimensions? 2019-07-16T23:21:07.170

29 The universe is in a long, slow decline to darkness (the stars are going out) - What can we do about it? 2015-08-12T18:50:53.233

23 A brief dip into the heat death of the universe 2016-03-11T12:59:09.647

22 Lost in the multiverse: how to find home? 2016-06-23T19:56:28.637

20 Universe where mathematics is different 2015-12-18T01:58:27.380

19 The One-Electron Universe postulate is true - what simple change can I make to change the whole universe? 2019-03-25T20:02:18.070

18 What would the Universe be like if gravity was slightly stronger? 2014-10-19T18:10:59.857

18 What would powers based on the four fundamental forces look like? 2017-01-15T19:03:36.050

15 Physical laws for a matter-filled universe 2015-02-26T01:44:44.420

13 How small can the universe be while still appearing infinite? 2018-08-23T19:32:42.073

13 Naming parallel universes 2020-02-24T17:57:19.880

10 How to justify that people forgot the past and that they have neighbours? 2018-07-17T07:54:34.723

10 Is it possible to have the age of the universe be unknown? 2019-06-05T13:08:30.847

9 What would happen to the universe if gravity became slightly stronger? 2014-10-22T07:34:17.547

9 Cosmic Background Radiation in the past 2015-03-22T13:10:12.647

9 Could cosmic background radiation be used as a means of cataloging parallel universes? 2015-10-16T20:10:56.093

9 Repulsive Universe 2016-01-11T15:07:45.490

9 What would shake a galaxy and what would shake the universe? 2018-10-15T00:08:21.107

8 Liquid universe: The beginning 2015-12-07T08:53:29.850

8 Slowing the Heat Death of the Universe 2016-01-13T00:32:04.963

8 Staggering "Now" Among Many World Multiverses? 2017-01-14T23:59:45.207

7 Cosmological consequences of a world with super-high refraction and atmosphere opaqueness 2014-10-06T15:53:51.733

7 Taming wormholes 2015-03-22T17:15:46.013

7 What if Newton's 1st law of motion is modified? 2015-05-05T16:28:49.383

7 Traveling Back in Time at the End of the Universe 2015-08-21T05:03:16.863

7 Other universes in a broad sense 2016-09-16T15:34:24.240

7 How Likely is a Planet Made Almost Entirely of Metals? 2019-10-04T16:27:57.403

6 Parallel universes, mirrored 2015-08-10T21:40:38.503

6 Consequences of a two-dimensional universe on cells and life 2015-09-29T19:02:17.533

6 How can civilizations develop if the day keeps repeating forever? 2015-11-06T07:30:56.867

6 What physical constraints should a near omnipotent civilization consider when simulating a Universe? 2016-01-29T01:13:16.570

6 How would a civilization similar to earth develop if there were no stars at night? 2016-02-29T01:57:28.380

6 How to reduce demagogues' influence on the universe literally shaped by people's beliefs? 2018-01-08T18:05:51.333

6 How close could a planet get to a super massive black hole before being destroyed 2019-02-05T16:41:25.973

6 What would it look like in the accretion disk of a feeding supermassive black hole? 2019-02-05T17:49:16.467

6 Parallel universe portals: an infinite hall of mirrors? 2019-08-04T23:15:22.923

6 What’s the difference between inter-dimensional, inter-universal, and extra dimensional beings? 2020-01-26T19:11:05.367

5 Could life in a planemo be sustained by cosmic background radiation? 2015-03-22T14:51:23.597

5 Small universe - is there any point in interstellar communication? 2015-08-13T17:52:12.053

5 Brain connection in an alternative universe 2015-10-16T20:02:31.263

5 How to tag each parallel universes? 2015-12-07T05:03:41.000

5 Considering life to be a matter modifier - what would be the final state? 2016-01-31T21:02:25.983

5 Can you just wait out the heat death of the universe? 2016-03-12T02:40:09.633

5 Travelling the multiverse by accident? 2018-10-04T02:43:17.277

5 A universe without light? 2019-07-16T20:29:59.543

5 How can I create an infinite space bound by another infinite space (or contained within it)? 2019-08-12T15:33:43.937

5 What would happen if the Earth passed through an interstellar dust cloud? 2019-08-12T18:21:18.777

4 Alien exploration : drone digging earth crust 2015-06-23T12:58:06.870

4 How does an advanced civilization *hasten* the heat death of the universe? 2016-03-12T21:22:38.773

4 In a parallel universe can there be non-carbon based lifeforms 2016-12-27T00:03:36.620

4 What are the Optimal Projects to Take Advantage of a Pocket Dimension with Variable Time? 2017-01-21T15:14:12.593

4 Can a planet with chaotic rotation have more than one ring rotating in differents axis? 2018-10-30T05:13:46.517

4 Would humanity go extinct if suddenly a parallel magnetic field of 1T fills the entire universe? 2019-12-23T02:03:07.480

3 Is there any evidence against alternate realities? 2016-07-25T16:55:56.597

3 What would be the "scientific" explanation for having memories from a parallel universe? 2017-01-23T13:44:42.917

3 Could you suspend your disbelief if I explain the oddities of quantum physics as a simulated universe with reduced dimensions? 2017-10-02T20:51:20.287

3 Physical laws for a multiverse with white holes? 2018-04-03T04:30:13.370

3 What would a world be like with cross dimensional contact? 2018-04-19T12:45:18.273

3 How can I prevent planeswalkers from organizing into an army? 2018-11-24T16:17:55.520

3 Could we become the universe? 2019-07-09T02:43:08.673

3 When will the last white dwarfs become black dwarfs? 2020-01-03T14:06:30.200

2 Okay gentlemen, we've voted to destroy the universe. Now, how do we do it? (Methods please) 2014-12-18T17:46:11.120

2 Are planets in the same altitude level? 2015-01-16T14:49:18.247

2 If our universe nucleated into a lower energy state without completely annihilating us all what could be the effects of changes in physical constants? 2015-03-30T15:45:50.460

2 Entropy of the afterlife 2016-11-07T11:41:20.170

2 How do you prove mirrors aren't literally parallel universes? 2016-11-23T21:15:14.190

2 Can the universes that make up the multiverse and alternate realities exist as 2 separate entities? 2017-09-07T21:37:07.170

2 What would entropy look like in an infinite number of universes? 2017-11-08T04:30:02.120

2 Worlds with different mathematics and logic 2019-09-24T06:59:15.503

2 Finding magic by repeating an experiment over a magical limit of the universe 2019-10-26T15:46:52.027

2 How would roads and buildings be constructed if universe does not allow parallel lines? 2020-02-17T02:41:00.973

1 Size of time loop required for development 2015-12-30T13:35:16.243

1 Our Universe, but with a parallel component that is somehow connected to every location 2016-04-30T18:36:04.370

1 The Universe's Own End 2016-06-22T21:32:34.150

1 Escaping the universe 2016-07-08T23:39:52.733

1 Material for container that survived the Big Bang 2016-09-13T14:58:31.523

1 Could a planet with no satellites and no tectonic plates be habitable? 2016-11-12T04:38:41.717

1 Size of the universe, zipped 2017-04-20T04:09:48.390

1 What could lead to the appearance of a wormhole relatively close to our planet? 2017-09-04T08:34:36.873

1 Variability in Alternate Universes 2017-09-26T20:46:51.217

1 "Alternate background colors" 2017-12-03T20:55:57.253

1 What happens to humanity if every star goes nova simultaneously? 2018-03-02T04:12:29.183

1 How everything will act in a world of two time dimensions? 2018-03-09T07:34:32.180

1 How could it be possible for an entire region of space to be filled with Earth like planets? 2018-04-20T17:53:37.073

0 Constants/properties of a very small-scale and compact universe that is still recognisably like our own (and is it possible) 2015-04-27T17:19:54.023

0 Nitpicking a Multiverse 2016-02-12T18:19:38.947

0 Multi universal communication 2016-06-15T21:20:35.027

0 universe with infinite energy 2016-08-19T00:15:53.903

0 Death as a parallel or serial process 2016-08-26T04:27:12.223

0 How does a community of a Universe Simulator have the same language as its creator? 2017-01-28T22:29:41.713

0 Can Brian Greene's Ultimate Multiverse contain Cthulhu Mythos? 2017-02-17T15:08:34.453

0 How are the directions on a planet defined? 2017-09-08T10:48:43.380