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2022-08-17: What If Dark Energy is a New Quantum Field?

  • 13:04: ... way that time travel does. So, if the big rip is possible, so are time machines, and we escape the end of the universe every time it comes ...

2022-06-30: Could We Decode Alien Physics?

  • 15:41: ... occurs to Greg N that we’ll most likely  encounter the machines built by intelligent   civilizations than the lifeforms ...

2021-05-19: Breaking The Heisenberg Uncertainty Principle

  • 00:20: Engineers have gifted physicists with some pretty incredible machines for measuring the universe.

2021-02-17: Gravitational Wave Background Discovered?

  • 00:00: ... of these space-time tsunamis would be invisible to our tiny human-made machines to see them we'd need a gravitational wave observatory spanning the ...

2020-10-05: Venus May Have Life!

  • 15:02: I go for every second Moore’s law doubling, which leaves my machines basically paralyzed about half the time.

2020-08-24: Can Future Colliders Break the Standard Model?

  • 01:16: Physicists have been building machines to accelerate and subsequently obliterate particles since the 1920s.
  • 13:17: Of coordinating thousands of scientists over many decades to build these crazy machines that can crack open the inner workings of spacetime.

2020-07-28: What is a Theory of Everything: Livestream

  • 00:00: ... doing precision measurements in all different types of lower energy machines right because the standard model is this wonderful sort of like brick ...

2020-05-18: Mapping the Multiverse

  • 12:42: ... thing collapses, shutting off any potential magical portals to time machines or new universes - probably before they ever ...

2020-03-24: How Black Holes Spin Space Time

  • 03:27: ... for another episode. For a preview check out our episode on time machines. Yup, the math says you can visit your past within a Kerr black hole. For ...

2019-10-21: Is Time Travel Impossible?

  • 06:51: We can’t completely rule out wormhole or warp drive time machines based just on the energy conditions.
  • 06:58: And as it turns out, there may be other ways to build time machines without either negative or imaginary masses.
  • 09:16: So it seems we have lots of ways to send things back in time, but it all seem useless for actually making time machines for one reason or another.

2019-07-15: The Quantum Internet

  • 15:03: Battlemechs, submarines, spaceships, DeLorean time machines - nuclear is probably the easiest option for the badass vehicles of the future.

2019-03-13: Will You Travel to Space?

  • 13:14: ... last week we explored the bad science of perpetual motion machines and announced the winners of the perpetual motion challenge. Check them ...
  • 13:27: ... points out that atoms are perpetual motion machines, and there are hydrogen atoms that have been ticking for the entire age ...
  • 14:58: ... us for putting the ElectroBOOM video that debunks perpetual motion machines alongside all of the other videos that actually claim to have built ...

2019-03-06: The Impossibility of Perpetual Motion Machines

  • 00:30: We have perpetual motion machines of the first kind - they violate energy conservation - they pump more energy out than they need to keep running.
  • 00:43: ... there are machines of the second kind - they’re a bit more subtle in their wrongness ...
  • 02:05: None of these machines actually worked.
  • 02:48: Thus the proliferation of first-type machines that could generate more energy than they used.
  • 03:20: All machines work by riding this flow of energy as it redistributes itself.
  • 03:26: Machines of the second kind claim to be able to tap reservoirs of energy that are already evenly spread – effectively reversing the growth of entropy.
  • 03:37: Before we get to modern perpetual motion machines, let’s take a look at some actually interesting ideas that illustrate the limit of the second law.
  • 06:06: These are perpetual motion machines that do not attempt to generate energy – they just keep themselves running forever.
  • 07:34: Now that we've reviewed three types of possible wrongness in perpetual motion machines, let's look at some of the modern proposals.
  • 11:55: And I leave you with wise words from someone who designed quite a few perpetual motion machines himself.
  • 12:21: Had only da Vinci known that his own perpetual motion machines could’ve score him such cool swag from Space Time.

2019-02-07: Sound Waves from the Beginning of Time

  • 16:37: So, no perpetual motion machines.

2019-01-30: Perpetual Motion From Negative Mass?

  • 14:21: Winning perpetual motion machines will be revealed in an upcoming episode of space time.

2019-01-24: The Crisis in Cosmology

  • 14:51: that they produce perpetual motion machines and paradoxes left and right.

2018-09-20: Quantum Gravity and the Hardest Problem in Physics

  • 09:03: If not, you could build perpetual motion machines, for example, using the Casimir effect.

2018-05-23: Why Quantum Information is Never Destroyed

  • 11:29: In a related question, AFastidiousCuber asks why free energy and perpetual motion machines are impossible?

2018-04-11: The Physics of Life (ft. It's Okay to be Smart & PBS Eons!)

  • 02:35: ... that data to build and control an entire factory of protein molecular machines, which in turn, power the entire biological process that is ...
  • 07:57: Living things are incredible heat dissipation entropy-maximizing machines.

2017-11-22: Suicide Space Robots

  • 09:37: It's our way of honoring the many brilliant scientists and engineers who poured their own lives into these ingenious machines.
  • 09:46: And eventually real live human explorers will follow these brave machines-- hopefully, with far fewer fatalities.

2017-11-08: Zero-Point Energy Demystified

  • 03:51: This is why so-called zero-point energy machines are baloney.

2017-11-02: The Vacuum Catastrophe

  • 04:31: ... be able to knowledgeably scoff at zero point energy perpetual motion machines. ...

2017-02-15: Telescopes of Tomorrow

  • 10:27: It includes a great lecture on telescopes, taking you from their most basic workings to the big bad machines we use in modern astronomy.

2016-09-14: Self-Replicating Robots and Galactic Domination

  • 00:13: But what about almost-living machines?
  • 02:40: We touched on the idea of self-replicating machines recently when we talked about the Dyson Swarm.
  • 02:51: Imagine-- a single machine that can build a huge variety of other machines, including itself.
  • 04:29: This suddenly makes it reasonable to use such machines for some pretty cosmic scale endeavors.
  • 04:40: ... space operation-- might be best handled with self-replicating machines. ...
  • 10:16: ... future of robotics, including space robots and evolving self-assembling machines, from Professor John Long's Robotics ...

2015-10-28: Is The Alcubierre Warp Drive Possible?

  • 04:30: Does anyone else get the idea that Stephen Hawking really doesn't want us to build time machines?

2015-05-20: The Real Meaning of E=mc²

  • 09:25: ... microwave ovens, Tang, Velcro, cordless power tools, the space pen, MRI machines-- none of those are NASA ...
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