Why do people think aliens can't exist?

I've only ever met one person in my life who says aliens can't exist. And according to them because they aren't mentioned in the Bible.

I know lots of people, though, myself included, who aren't remotely convinced by the claims of people that say aliens exist and have visited us.

I think in all probability life has evolved all over the universe. It may even have evolved independently more than once on this planet but other simple forms were out competed by the ones that would eventually lead to us. And we would have no real way of ever knowing this.

It's not as much if a given, though, that many other planets harbouring life have produced species intelligent enough to have self awareness. Even on our own planet it took a long time to happen and was never a given. Humanity hung by a thread at one point in our history, and life gets along just fine being dumb as a box of coprolites. Even our own.

The other issue is even if an intelligent species does pop up it's possible they destroy themselves before they reach the intergalactic travel stage.
 
Humbug said:
Then WHO is shitting on my car??!!?
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You asked.

Season 9 Nbc GIF by The Office
 
KHAAAAAAANNNNNNN!!!!!!!! said:
The most distant space probe, Voyager 1, was about 18 light-hours (130 au,19.4 billion km, 12.1 billion mi) away from the Earth as of October 2014. It will take about 17500 years to reach one light-year at its current speed of about 17 km/s (38000 mph, 61 200 km/h) relative to the Sun.

Our nearest stars Alpha Centauri A & B are roughly 4.35 light years away from us. Proxima Centauri is slightly closer at 4.25 light years.

That's 70,000 years @ 38,000 mph for just the nearest stars to us.

The distances aliens would need to travel to get here are unimaginably large. And out of the estimated 100 to 400 billion stars in the Milky Way galaxy, they would have to choose ours to investigate.
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Unless there's intelligent life much closer and have figured out how to cloak the possibility of their existence from what we use to detect a livable planet. Assuming they once used similar methods as us to look for the ability of life elsewhere and they have the tech, they could do that.
 
"Can't exist" and "we haven't found a single skerrick of reliable evidence" aren't quite the same thing.

Only one planet we have ever observed has plate tectonics for ongoing geological circulation, a moon so big it's almost a double planet (tides are very important among other factors), oceans and life. Ours. And we have no clue how life began here (a different question to speciation once life began).

And that's just simple life-forms, not rational scientific intelligence, which one species of all those that have lived on Earth for millions of years ever developed. Would we expect to see a duck-billed platypus anywhere else in the universe? Why expect this specific adaptation anywhere else?

Possible, yes. Evidence is lacking.
 
KHAAAAAAANNNNNNN!!!!!!!! said:
The most distant space probe, Voyager 1, was about 18 light-hours (130 au,19.4 billion km, 12.1 billion mi) away from the Earth as of October 2014. It will take about 17500 years to reach one light-year at its current speed of about 17 km/s (38000 mph, 61 200 km/h) relative to the Sun.

Our nearest stars Alpha Centauri A & B are roughly 4.35 light years away from us. Proxima Centauri is slightly closer at 4.25 light years.

That's 70,000 years @ 38,000 mph for just the nearest stars to us.

The distances aliens would need to travel to get here are unimaginably large. And out of the estimated 100 to 400 billion stars in the Milky Way galaxy, they would have to choose ours to investigate.
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I remember a stat from back when I was in elementary school -- If you drove 100 mph, 7 days a week, 24 hrs. a day, it would take approximately 4600 yrs. to get to Pluto.
 
Anyone watch the Danny Jones Podcasts on Youtube? He has a TON of conspiracy content,
and I treat it like interesting content. I am not a believer. I am not a disbeliever.

Things that make you go ..... Hmmmmm..... :unsure:
 
Jynx said:
The other issue is even if an intelligent species does pop up it's possible they destroy themselves before they reach the intergalactic travel stage.
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We also probably think that an intelligent alien race would be about the same size as us, give or take. But what if they are just really tiny, like ant size? Would they be interested in space travel if their world is as big as our planet, but they occupy a fraction of the space we do and thus have more resources to consume?

If we didn't squabble over territory, resources and other bullshit, we could probably be already to Mars, but likely no further. Instead we would most likely end up in an Interstellar style situation where our world is already royally fucked before we'd pool our resources and try to find a new home. Even then we'd still need some sort of hyperdrive or wormhole tech to cross the distance, or just do a hail mary one way trip that takes years (which still leaves very few options for the destination).
 
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