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

86 How to monetize free energy without revealing its existence? 2017-07-10T10:57:54.843

80 Can stars that are not powered by nuclear fusion exist? 2015-08-17T17:03:07.400

73 How can Elsa's power fuel my Industrial Revolution? 2017-10-09T18:51:54.337

72 How to harness Jupiter's gravitational energy? 2016-11-02T14:58:14.213

44 What are the safety margins for destroying a planet from space? 2018-04-24T21:34:35.340

41 What could be the right powersource for 15 seconds lifespan disposable giant chainsaw? 2019-04-09T09:51:50.897

40 With current technology, what would be the best way to store energy for future generations? 2015-08-21T21:36:02.423

39 What would be the ideal power source for a cybernetic eye? 2019-04-15T12:36:53.350

38 In a post-fossil fuel economy, what could natural gas pipelines be used for? 2018-06-07T13:33:41.330

35 Is a food chain without plants plausible? 2016-10-19T18:43:36.897

28 Consequences of an Earth-size object hitting the Sun? 2020-01-15T14:54:24.740

27 What is the best way to use my two portals? 2016-01-02T22:37:24.510

26 Solar flares: "the week the earth stood still" 2014-12-18T15:25:44.060

26 Would it be realistic to store energy using gravity by elevating buildings? 2017-01-10T21:30:14.327

25 How would relatively cheap and abundant (but not free or limitless) electrical energy at an up-front cost impact society? 2015-09-28T08:20:27.513

25 Is it possible to have battery technology that can't be duplicated? 2019-06-10T21:08:53.907

24 Justifying the use of directed energy weapons 2019-08-21T08:51:37.633

22 Shooting an energy beam into the Sun (from the Earth) in order to destroy it 2014-12-12T14:35:50.457

22 Power plants — literally 2015-02-25T12:35:35.197

21 What are the main problems with beaming light from the Sun to Saturn? 2017-01-12T16:07:36.787

20 How do I feed my black hole? 2019-08-25T21:45:26.867

19 A Trillion Unruly Gods 2015-02-17T22:40:59.180

19 What would a life-form be like if it's antimatter-based 2019-11-03T00:47:30.490

18 Would the existence of magic accelerate or slow heat death? 2016-08-03T13:45:38.607

17 Would solar cells last? 2017-09-09T07:45:13.720

16 What are some of the most powerful theoretical sources of energy? 2020-01-01T11:17:41.920

15 Energy source for a generation ship 2015-01-11T17:06:50.890

15 Entry requirements for a Type n civilization 2015-04-02T19:07:35.220

15 How might kinetosynthesizing "plants" look? 2018-08-24T15:29:26.390

14 Assuming magic is a source of energy that wizards have access to, how would they "bleed off" the energy when not using it? 2014-09-22T15:27:28.603

14 Renewable energy in space 2016-02-18T16:04:58.523

14 How to heat a windmill ? (Mechanical to thermal energy conversion) 2016-09-01T06:51:22.257

14 How efficient can my neutrino detector be? 2017-12-14T15:34:09.417

14 How much energy did it take for God to part the Red Sea? 2018-11-29T00:07:20.683

13 Off-planet energy production - what would be best way to supply this energy planetside? 2017-07-13T11:57:25.600

13 Would it be possible to use geothermal energy on mars? 2017-07-14T11:39:04.243

13 What are the risks with massive banks of batteries/capacitors? 2017-11-04T01:49:48.247

13 Solar recycling or: How to keep your star from dying 2018-12-18T20:53:55.830

12 Constant artificial light 2014-12-01T10:56:28.977

12 How much power can you send via a laser through the atmosphere without catastrophic effects? 2014-12-18T17:29:39.230

12 Can wind power run heavy weapon factories on Mars? 2016-02-18T10:29:22.240

12 What is the caloric requirement of a fire spell? 2016-08-22T15:09:13.410

12 Does it make sense to have a type of energy generated from stars that humans could absorb for magic? 2016-12-01T22:50:16.347

12 How would an energy-based "projectile" blow up a spaceship? 2019-03-08T11:35:09.730

11 What would be the consequences of overusing a magic system that consumes energy from human metabolism? 2016-12-01T22:46:55.067

11 What does a small fusion reaction sound like? 2017-03-16T01:13:07.743

11 Could a species evolve a special organ that stores pure energy & allows it to control its own magnetic field? 2017-07-11T03:41:25.703

11 Hypothetical energy source with higher output than Dyson Sphere 2018-10-18T15:01:23.780

11 How Efficient Could Anaerobic Megafauna Be? 2019-07-16T12:46:52.130

10 Technological applications of light only wormholes 2015-12-21T17:54:32.250

10 Explosion contained in the depths of a crystal: how would it work? 2016-11-07T22:24:00.300

10 How to defeat an enemy that feeds off energy 2016-12-05T19:56:41.900

10 Is there a way to buy oil from a country under embargo? 2016-12-28T17:33:30.730

10 Can Zeppelins and Blimps replace cars in the future? 2018-05-21T06:29:33.383

10 How could dragons produce the energy needed to sustain themselves from gold 2019-02-28T19:50:24.023

10 Feasability of miniature nuclear reactors for humanoid cyborgs 2019-04-09T14:13:14.400

10 Realistic Interstellar Energy Transfer 2019-07-31T13:04:03.783

10 Would that heat-engine provide power to the colony on Titan? 2019-10-29T08:06:34.243

9 How much power would artificial gravity and inertial dampeners require? 2015-02-10T09:50:45.023

9 Feasibility of Capturing Hydrogen from the Solar wind 2016-01-23T18:21:17.087

9 No sunlight, just high-energy radiation? 2016-02-21T16:40:37.433

9 Far Future, Space. Most plausible way to store short-term energy? 2016-04-22T10:44:25.370

9 If energy is conserved, how much energy do I need to reasonably use skeletons as a tomb defense? 2017-03-20T13:42:04.437

9 Capital space ships: Several large fusion reactors vs many smaller ones 2017-08-25T15:51:57.080

9 Synthesizing fuels with excess energy 2017-11-04T17:36:37.857

9 Could black holes be a better source of energy than stars? 2018-03-21T00:26:31.287

9 Cost of electrolytic hydrogen 2018-11-25T01:19:33.280

9 What's a good way to classify railguns? 2018-12-30T01:08:55.230

9 Repurposing A Cargo Ship In A Post-Apocalyptic World 2019-01-08T18:07:42.630

8 Energy in a human body? 2015-03-14T03:14:25.763

8 What is the most efficient way for human beings to create electricity with manual labor? 2015-03-25T01:31:23.000

8 How to explain lack of fosil fuels on an Earth-like exoplanet? 2016-09-09T20:35:39.640

8 How could I make a portal to parallel universes as scientifically realistic as possible? 2016-11-28T20:32:55.153

8 How do I reconcile portal mechanics for all situations? 2017-02-19T17:17:39.970

8 Is it possible for an organism to convert magnetic radiation into a sustainable energy source? 2018-07-18T00:50:38.067

8 How much fat would need to be burned in order to shock-restart a human heart? 2019-03-25T14:33:57.357

8 How small can a perpetual energy source be to run a far-future civilization indefinitely? 2019-03-30T04:41:10.150

8 Would a magic-using society create living batteries? 2019-11-08T22:29:59.647

7 Is it possible to use Venus' temperature to generate electricity, and how would the electricity be transferred to Earth? 2015-03-29T21:39:32.827

7 Robbing the world of 1 second 2015-05-02T02:29:21.313

7 If we had easier access to antimatter, how could we use it? 2015-05-09T21:17:07.960

7 Cold Earth (or a big rock with atmosphere) 2015-09-16T15:35:19.417

7 Can life be powered by thermal conduction? 2016-05-26T14:53:08.043

7 What would it be like living underneath a solar thermal tower in the middle of of post-apocalyptic city? 2016-08-16T08:05:53.723

7 How would technology adoption of Lithium Air battery work? 2016-10-22T11:01:51.680

7 Technology to create energy for a village of 200 people long term 2017-01-01T23:23:54.293

7 Disabling a spaceship while leaving it repairable? 2017-06-28T03:46:19.577

7 Can amber and resin be a viable fuel source (for Steampunk civilization)? 2017-07-25T10:34:49.103

7 Thermal Energy Recycling from Daylight Operation to Power Night Time Operation of Volatile Computer Storage 2017-12-08T14:34:37.363

7 What conditions could create a planet that has higher amounts of antimatter in its radiation belt? 2017-12-27T17:45:59.027

7 Backing Futuristic "Credits" with Energy? 2018-07-22T05:27:33.773

7 How would I gain energy from a rotating planet? 2018-08-29T22:25:26.040

7 Power Generation Using Undead 2019-03-09T01:08:02.603

7 If curse and magic is two sides of the same coin, why the former is forbidden? 2019-03-15T12:01:59.877

7 How much energy can I produce per kg of hydrogen using this process? 2019-05-28T13:49:17.793

7 How much energy do plants produce? 2019-11-08T22:11:44.623

6 Is it possible to harness energy from natural disasters? 2015-03-29T08:55:45.327

6 Dyson sphere construction 2015-05-26T19:20:18.213