@bachelorchownowwithflavor3712
"The universe is not required to be in perfect harmony with human ambition." -Carl Sagan
@krishp1104
Does anyone realize how crazy it is that we can even theorize something like this
@TheCarnivalguy
This is the only limerick stuck in my brain from childhood. There once was a fellow from Bright Whose speed was much faster than light, He set out one day In the usual way And returned on the previous night!
@shinysheepy6311
"It almost seems like a cruel cosmic joke that the universe be arranged such a way that we are able to look out and glimpse its wonders and yet are trapped here by the speed of light." So well said:washhands:
@JACK_TheAllSeeingEye
There once was a young lad named Mike. Who could run faster than the speed of light. He took off one day, In a relative way, And returned on the previous night!
@tayzonday
The speed of light should really be taught as the speed of causality. The speed of light is an incidental stenographer of the speed of causality.
@BruceHenals
Imagine showing this video to a 12th century peasant
@yapdog
The universe doesn't care if it makes sense to us.
@mw2zorzest
Well, I don't know about time travel, but a fascinating thing to think about is that if you could travel FTL and have a way to look at earth from any distance, you could go far enough away from earth to see the past.
@caitlyn9972
Omg this diagram finally explained why and how space and time are connected. Thank you so much. I always thought I understood this concept but I was just repeating info not fully grasping it.
@BHJ7115
Here we are in 2025 with super computers, theories, and still no real answers.
@zadrik1337
I like how Terry Pratchett said it better than the way Hawking did: Everything that happens, stays happened.
@Heretbg
Yet again you combine scientific explanation with a thoughtful and beautiful message. Thanks for one day deciding to start doing these videos, they mean a lot to me.
@Icedragon256
I landed at the same "strict rules" conclusion back in 2007 when designing a sci-fi setting with FTL. I borrowed a bit from Douglas Adams and ended up with a version similar to one you hinted at. That any attempts to perform an action which would result in a paradox would be met with increasingly unlikely events to prevent it from occurring in the first place. Thus, before sending any FTL comms, or engaging in certain kinds of travel, you have to draw the light cones and think through the implications as shown in your video. Thanks for putting this together. It was nice to see someone think through the same things and tie it into a neat package.
@swaggamesph3342
We are asking the same questions again and again. What we need is to know the new correct question(s) which havent been answered yet.
@KrazyTrumpeter05
My mind is blown. When you switch the communications to "instantaneous" and re-explained the diagram, everything started making sense. I have had so much trouble trying to conceptually understand these potential issues with FTL travel/communication and this has helped so much. Still hope we figure out a way around it, though! Like you said, it's criminal to be able to see all this cool stuff out there and not actually be able to go see it ourselves.
@victorcurysimionato6412
Congratulations, you had my complete attention to the entire 25 minutes. Very well done video and explanation. Super interesting
@yufansa
"The cosmic speed limit, the speed of light is so diminutive compared to a galaxy. It almost seems like a cruel cosmic joke that the universe be arranged in such a way that we are able to look out and glimpse its wonders and yet are trapped here by the speed of light. Fated to only ever peer through the bars of our cosmic prison and dream." -- This is so beautifully spoken...
@nikolas1171
"You think i want to go to the stars? I dont even like to fly. I like trains!" - Zefram Cochrane
@realbrickbread