Showerthoughts

30316 readers

1013 users here now

A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted, clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts: 1

Rules

All posts must be showerthoughts
The entire showerthought must be in the title
No politics
- If your topic is in a grey area, please phrase it to emphasize the fascinating aspects, not the dramatic aspects. You can do this by avoiding overly politicized terms such as "capitalism" and "communism". If you must make comparisons, you can say something is different without saying something is better/worse.
- A good place for politics is c/politicaldiscussion
- If you feel strongly that you want politics back, please volunteer as a mod.
Posts must be original/unique
Adhere to Lemmy's Code of Conduct

If you made it this far, showerthoughts is accepting new mods. This community is generally tame so its not a lot of work, but having a few more mods would help reports get addressed a little sooner.

Whats it like to be a mod? Reports just show up as messages in your Lemmy inbox, and if a different mod has already addressed the report the message goes away and you never worry about it.

founded 2 years ago

MODERATORS

vatlark

forkball

Thekingoflorda

253

The reason why we never meet time travelers is because our civilization ends before the technology can come to fruition. (self.showerthoughts)

submitted 9 months ago by TheGiantKorean to c/showerthoughts

100 comments fedilink hide all child comments

Sort of similar to the Great Filter theory, but applied to time travel technology.

you are viewing a single comment's thread
view the rest of the comments

[–] cygon 1 points 9 months ago* (last edited 9 months ago) (1 children)

Reading that formed an interesting question in my (also non-physicist) mind:

If we can, at most, take advantage of relativity to slow down our own time frame, then time could just be our way to describe the pace of how space changes around us following simple causality.

But if, on the other hand, it is possible to move backwards through time, wouldn't the universe have to necessarily exist not only as a giant block of eternally changing 3D space, but as a giant block of 4D spacetime one could move around in? And would that mean predetermined past and future, or would that 4D block of spacetime change, too, advancing through meta-time, continually changing future and past of the universe?

ScienceClic has a cool video, stipulating that we live in 4D spacetime and are bound to always move forward at light speed. If we stand still in 3D space, we move forwards in time at light speed. If we accelerate in 3D space, we change out motion vector from only pointing forwards in time to pointing slightly sideways (up to completely sideways, i.e. time stops, if we were able to move at light speed). But there may be now way to do a 180 involving the time axis like we could do involving the other 3 axes.

[–] [email protected] 1 points 9 months ago

Here is an alternative Piped link(s):

cool video

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source; check me out at GitHub.