Why do people think aliens can't exist?

Ants are surprisingly intelligent when viewed as a colony rather than each ant. E.O. Wilson did quite the life's work on the topic (his take on Marxism: "Good idea; wrong species"). Try also the documentary Ant Mountain. Most species are at war with each other over territory, resources and other matters of life and death - and with anything else that threatens them. The ants of Ant Mountain stopped that and make up one huge colony/mind.

Mars is dead of volcanic activity and has no magnotosphere sheilding radiation - and is why threre is no water anymore. God only knows what would come out of a womb at reduced gravity or zero. Distances to the neastest stars with no suitable planets are prohibitive.

We have evolved to live on Earth and all its quirks and nowhere else. Any alien that might arrive would probably either wipe us out with disease or we would do to them a War of the Worlds and our diseases kill them.

But I did like Carl Sagan's quip about what we should communicate to an alien species if we found them trying to communicate with us: "The complete works of Bach. But that would be showing off."
 
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All speculative endeavours (religion, politics, aliens, meaning of the Universe) collapse under
the weight of our massive intellectual limitations. As a result they become a faith-based belief
systems. :brick

Take my word for it! :LOL:
 
I guess they built Atlantis, some pyramids and odd structures everywhere in the world except Australia and buggered off.

Maybe its just me/us Aussies feeling left out of the Ancient Alien stuff.
 
I guess they built Atlantis, some pyramids and odd structures everywhere in the world except Australia and buggered off.

Maybe its just me/us Aussies feeling left out of the Ancient Alien stuff.

I don't know much about Australia but you have quite a lot of interesting yet scary reptiles there.

If I was an alien I would be happy to have a non poisonous lizard (if they exist) sitting on my shoulder, but I would hide behind the couch when I see a snake.
 
I don't know much about Australia but you have quite a lot of interesting yet scary reptiles there.

If I was an alien I would be happy to have a non poisonous lizard (if they exist) sitting on my shoulder, but I would hide behind the couch when I see a snake.
We just live with it. One of the most poisonous and deadly snakes in the world is the Common Brown. And when you are told "The snake is more scared of you than you are of it." don't believe a word of it if visiting. Lots of ours are very bitey.

My mother used to tell the story of playing with the octopuses at the beach as a child - until an adult freaked and told her the Blue-ringed Octopus is one of the most deadly critters there is.

Billy Connolly told the story of how annoyed he was with people at the beach when the car alarms would go off and everyone would head in. His wife quietly told him: "Billy, that's the shark alarm."
 
Doh! I forgot the basic rule: if you bite it and die it's poison (many berries, leaves and bugs), if it bites you and you die it's venom (spiders, snakes, octopii, stingers...).

We got both in abundance! I wonder what happens if you bite a Death Adder before it bites you...?

EDIT: Shark and crocodile bites are a different risk.
 
Given the myriad conditions in which life on Earth can thrive, and given similar conditions exist or have existed right here in our solar system, it's quite possible that we could discover life or history of life close to home.

Also, it may well be the case developing the technology to push a large object near the speed of light is simply not possible to create. And even if it is, an intelligence capable of doing so may choose not to, given the travel time to the nearest planet relative to their home planet makes it impractical. Heck, people look my wife and I like we're crazy when we tell them we went to a restaurant 15 miles away. Try going to one 75 light years away.
 
My theory on why we haven’t been visited by extraterrestrial beings.

Once we develop the ability to travel much faster and farther through space we will find that our universe is singular and contained inside a large glass jar. A pickle jar of course.

The whole thing is a brilliant young students lab project, a vacuum sealed container gas cloud experiment, that his proud mother didn’t want to throw away.

So when we finally fly up to the edge of the universe, hit the glass and start observing what’s beyond, we will be confused as we will be looking at the mysterious surfaces and shadow textures that are in fact the trophies and awards this student earned, all packed on the top shelf of his bedroom closet around our universe.

One day his parents will downsize their home as the kids all moved out. All the contents of that closet, along with our glass jar universe, will be shipped of to the county land fill / incinerator site as they drive off to their world’s equivalent of Miami Beach for retirement living in a condo by the ocean.
 
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