What's the most convincing evidence of aliens?

1. The size of the observable universe.

2. How limited our means of observing it are.

>>18148990
This. Aliens exist, it's nearly a mathematical impossibility for them not to. They have never been here though.

>>18148990
Endless amounts of nothing = something

>>18149004
Except that it isn't endless amount of nothing you mong. I guess you didn't realize that the billions of galaxies and planets are "nothing"

>>18148683
Principle of relativity + size of the universe

>>18148990
Also the fact that NASA relies so much on them being human-like that it is stupid. Just because it can't hold our life doesn't mean it can't hold other life.

>>18149107
>relies so much on them being human-like
they dont really do this. what do you mean?

the brains ability to think, understand, and communicate

>>18149107
what the hell are you talking about?

>>18148683
Your mom's ass, its out of this world!

File: 1463337316937.png (211KB, 480x368px) Image search: [Google]

211KB, 480x368px

There was a time, billions of years ago, where THREE planets in our solar system simultaneously had oceans and organics capable of sustaining life. Only one kept those.

Mars lost its magnetic field when its core cooled and along with it most of its atmosphere and oceans to solar radiation (the entire northern hemisphere was once underwater). There still may be very small isolated bodies of water but they are hard to find.

Venus suffered a runaway greenhouse effect when increasing levels of water vapor passed a "tipping point" and trapped so much heat (causing further evaporation) that eventually the oceans boiled away into steam. The plate tectonics shut down and CO2 could no longer be recycled back into the mantle and we're left with acid-baked oven we have today. The soviet union remains the only country that has ever made successful probe landings on the surface, and they only survived a few minutes before presumably melting.

Earth, on the other hand, managed to save its biosphere even after suffering a collision with another fucking planet.

Really makes you think...

>>18149000

>they have never been here

How have you managed to know this?

>>18149883
Earth Stronk!

>>18149107
Can't just build a probe to detect a nebulous concept like life. Gotta actually search for something. Water, radio signals, non-equilibrium atmospheres, these are all definite phenomena we can actually detect.

Their silence.

>>18150797
Not him, but I'm guessing it's an assumption along the lines of "if they ever visited, we'd know".

File: blue-skies-pluto-new-horizons.jpg (28KB, 1000x1000px) Image search: [Google]

28KB, 1000x1000px

>>18149883
and then there's pluto with an atmosphere and liquid water.

File: 1472261206928.jpg (73KB, 600x536px) Image search: [Google]

73KB, 600x536px

>>18151368

>-370°F
>atmosphere 10,000 x thinner than Earth's and 100 x thinner than Mars's
>liquid water

>>18149107
You mean carbon-based with technology comparable to ours? Trust me, NASA, SETI and all the others would love to have a broader understanding about life than just what we know off on this planet but we simply don't since we haven't discovered anything outside of this planet yet.

>>18149883
There is also Jupiter which is an asteroid magnet and protects the earth from asteroid and meteorite attacks preventing mass extinction.

>>18151531

what are underground oceans? learn to Europa fucking scrub

File: image.jpg (115KB, 600x667px) Image search: [Google]

115KB, 600x667px

>>18149070
It's not billions. It's fucking trillions. There is one galaxy we know of that has over a trillion stars.