Ok, since you like science questions, here’s one (kinda), do you think time travel is possible? Could humans figure it out?
Depending on how philosophical you want to get with it, I’d say time travel is somewhat possible already, just not in the way you might think (Dr Who time machine that beep-boops you into the past/future). I don’t think we’re likely to figure that one out.
If you count merely seeing the past as time travel, we can already do that with telescopes.
If you look at Saturn through a cheap telescope, you’re not seeing Saturn as it is currently, but the Saturn of about an hour ago. You’re seeing the past, because we can only see things with light, and light has speed. A really fast speed, but it’s still a finite one. And with speed comes time. For light to travel, which allows us to see things, time has to pass. The farther something is from us, the longer that time is.
With the powerful telescopes we have today, we can see stars and galaxies billions of years old. The oldest among them are over 10 billion!
If they could look back at us, there would be no Earth for them to see. Maybe whatever’s over there is already smart enough to search, but we can’t know, just like they can’t know about us either, since their image of our corner of the universe is frozen from all of those years that it took for our light to reach them.
With other closer stars and galaxies, were they to look at us, they’d see dinosaurs, ice ages, maybe a planet with no life at all. At every given moment we’re beaming our past out into the universe. Just like they’re doing to us.
It might not seem like some grand, loud revelation to merely look at a star, galaxy, or planet, but it’s a glimpse into the past. And it’s been there all along, sitting in our sky, waiting for us to look.
You might not be able to experience the past with all of your senses, really go there, but you can see it. Ironically, the only past we can’t fully look into is our own.
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