/sci/ - Science & Math

>>6213372

How the fuck would you know?

>>6135889
No where in my post did I specify -intelligent- life. I believe anything with intelligence is exceedingly rare, and we're separated by so much space and time from one another we'll never encounter them. We'll find ruins of dead civilizations, species that transcended and left this universe behind, and lots and lots of unintelligent life, but nothing resembling ourselves o that we would recognize as intelligent. "Apes and Angels" if you will.

I've specified in another post >>6135835 why I think "life" in general is fairly common in the universe.

>>5841551
Judging just from Earth, sapient life is really, really fucking rare, and even then it's possible most civilizations destroy themselves fairly quickly. So if we ever venture off to the stars we very well may find a shitload of non-sentient life, and plenty of old ruins from other civilizations. Also keep in mind that the universe is really, really, really fucking big.

SETI finally discovers an extraterrestrial signal from a system that's relatively nearby.

How does humanity react, what do we do? Send a signal? Is a decision made in the UN or something?

Would the existence of dark matter interfere with the collision of galaxies?
http://en.wikipedia.org/wiki/Bullet_Cluster

>>4093031
>where are they?
Pic related, their signals probably haven't even reached us yet, and that's assuming the signal itself hasn't degraded into nothing.
Sure, no wave patterns are actually 'destroyed', but energy of the signal can and will decrease as it travels, while also being masked by other signals on the same vector as it.

>>3945901
>They'd get scrambled and become virtually unrecognizable after traveling a few light years?
Roughly, yes. TO get a clear signal they'd have to be within temporal range and looking STRAIGHT at us.

Pic related, it's how far our signals have reached.

>>3934569

the long distance fees cost too much time. nobody has picked up because nobody has got any signals

(a^3+b^3)(a^2-2ab+b^2) / (a^2-b^2)(a^2-ab+b^2)
=
(a+b)(a^2-ab+b^2)(a^2-2ab+b^2) / (a-b)(a+b)(a^2+ab+b^2)
=
a^2-2ab+b^2 / a-b

can somone point out my mistake the textbook says its just a - b?

There is a third explanation: we have access to such an infinitesimal area of the universe that there are aliens, some of which may have lesser technology than us, but they're not near enough.

Space travel is possible, but we've only ever been outside of our own solar system once, and that's with a satellite that just recently drifted outside of it. That's just our own solar system, which is like a grain of sand on a beach.

As for broadcasting our existence, see pic. Remember that radio waves travel at the speed of light. After all this time traveling at the speed of light, that's how far our signals are, and that's just in our own galaxy. There are MILLIONS of galaxies in the universe.

Feel small yet?

you have 10 minutes, explain quantum entanglement (youtube has failed it has queer sudo-science stuff all over).. I read a interview with Anton Zeiliner in Discover magazine today and it got me interested.

pic unrelated

deal with it