Q&A: The End of the Universe – with Geraint Lewis

21 thoughts on “Q&A: The End of the Universe – with Geraint Lewis”

1. When will the new updated school text books be available for students?

2. Isn't matter-antimatter annihilation another efficient energy source? What are the possible ways of creating/collecting and storing large amounts of antimatter?

3. So, is the universe expanding multidimensional sphere or is it infinite? And is there a way to know the difference?

4. I would recommend to him to go to Collision Builders Summit and be educated…

5. Could we request that if the microphones aren't working efficiently that we repeat the questions please?

6. The science is very interesting sad but interesting in this case to have to leave our beautiful planet. I hope that you Love your current political system because say for example on Mars, you wont be able to afford your electric bill, food will have to be supplied to you, to mention just two things so you see .. Love your political system, join it if you dont, and while living on earth fight to preserve our natural resources which are currently fighting pollution. There are two flights to Mars scheduled to take off at the end of 2019.

7. No mention of zero point energy.

8. The speed of light is not about light. It is about information. The speed of light is the maximum possible speed by which two people (or two anything) can communicate with each other. Light just happens to have this speed. So, the cosmic expansion is not violating the speed of light, because two local areas can't communicate with each other anymore.

9. Hey, I want that GR lecture………………….bring this guy back, he was very e l u c i d a t i n g…………thanks

10. Awesome professor

11. Well, if science can postulate that a form of energy exists, just because probable effects of it can be observed (dark energy making the universe expand), without knowing anything about its properties, I think I can postulate the following explanation for the existence of the whole universe:
    An unknown form of energy prior to the Big Bang formed a thought/vision (an immaterial Boltzmann brain basically), calculated all the constants and laws for a functioning physical universe, transformed itself to a physical state (Big Bang) with probability (quantum physics) and volume (massive amounts of objects to create an enourmous variation, so that life would evolve with 99.9999 probability somewhere) principles. Basically, evolution has taken place prior to Big Bang, and we are an extension of a natural Creator. It also explains the fine-tuning of constants in cosmos, which science hasn’t got a clue why they are as they are.

12. "what is the economy expanding into?" The universe aka available resources. Cmon ppl. Physicists only pretend 'what the universe expands into' is not a valid question because they have no answer unless it's a contradiction created by them for themselves. Just like how it is the most basic principle that the laws thermodynamics and conservation of energy are unaviodable, but then you have the big bang where everything comes out nothing, which is altogether is the biggest contradiction you can possibly come up with. This is why some logical minded scientist type mathematicians told me they picked math instead of physics when going to the university, from their perspective the whole thing is 50% just silliness.

13. Nobody will ever have to complain about the end of univers… aftertward!

14. Can you really kill the big crunch theory if
    1. you haven't seen beyond the horizon. There might be effects at the "edge" or the "beginning" of the universe that act differently as the rest of the universe i.e. is denser or w/e other thing comes to mind. During inflation, stuff could've been pushed very densely at the "edge/surface". What odd effects do you have at the "edge/surface" when a star explodes there.
    2. the dark energy changes over time. Perhaps it lasts exactly as long as matter holds/generates energy. To extrapolate the characters of dark energy even over 14 B years by observing the galaxies or stars exploding, might not be enough to show its relation to scales such as 10e100 years. Different energy releasing events or "stages" of the universe could have a considerable effect over the dark energy. Its also fun to think that there is a point in our history where dark energy's push has overcome the gravity's pull… Which would actually put into question, how did it ever go past, why did it expand in the first place, right? If you imagine the extremely rapid deceleration of inflation and if that deceleration were caused by gravity, then it would've collapsed right there and then.
    3. we don't know the overall structure of the universe or multiverse for that matter.

    Wouldn't it be better to hold both theories on the table until there is no "dark" anything.

15. The End Of Time…Perry Como sang that, didn't he?

16. can someone fix the second mic? turn it up a bit. have it closer to the face. 😀

17. It is said that energy can sometimes pop in and out of existence. Maybe the big bang happened like this but it failed to disappear afterwords, or something else went wrong. Also, there was an imbalance of matter and antimatter afterwords, maybe as a result. Was the universe an accident? What else went wrong?

18. The weirdest thing that comes to my mind is that how come we exists, how come the universe exists? The very thing of existing is troubling and confusing.

19. Energy is conserved in black holes people the universe knows how big is needs to be for the expansion. The universe isn’t expanding it’s the galaxies within the universe that’s expanding. The universe has a set size it has life cycles and there’s a multiverse all with there own universes and different properties. So listen here carefully black holes collect matter all matter will disappear into Black holes. Black holes don’t lose energy they only gain mass from eating all the matter within its galaxy so by the time that the galaxies are all gone and black holes are only left all the black holes will collide with each other till there are only two black holes left in our universe with all the mass that ever was think of this dark energy like a particle accelerator bringing these two remaking black holes towards each other with the assistants of gravity they come crashing and guess what it’s the Big Bang all over again everything comes back to be we our families we all come back history repeats itself. Have you ever had a Déjà vu? How do you think we can predict precisely? We been doing this for a infinity

20. If there’s a multiverse then the universe has edges

21. Dark energy was present at the dawn of inflation then dark energy disappeared and bounced off the edge of the universe and came back to the center and now we’re traveling with it faster and faster

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