If you were an alien, then a human would be an 'alien' to you. And since humans aren't going around the cosmos trying to take over different planets and kill the inhabitants, why should we suppose that the 'other' aliens want to do so. Perhaps they are happy on their alien planet watching alien tv and surfing their alien internet.
We barely made it to the moon, and then pretty much gave up. The distances to any nearby planets capable of sustaining life are so huge that it really wouldn't be worth the bother.
Smoke - Big Bang was a term coined by a scientist called Hoyle. He thought the theory was stupid and was trying to make a joke by using such a silly name.
If you were an alien, then a human would be an 'alien' to you. And since humans aren't going around the cosmos trying to take over different planets and kill the inhabitants, why should we suppose that the 'other' aliens want to do so. Perhaps they are happy on their alien planet watching alien tv and surfing their alien internet.
We barely made it to the moon, and then pretty much gave up. The distances to any nearby planets capable of sustaining life are so huge that it really wouldn't be worth the bother.
Smoke - Big Bang was a term coined by a scientist called Hoyle. He thought the theory was stupid and was trying to make a joke by using such a silly name.
And the expanding universe can be proved by Hubble's Law, not particle physics.
http://en.wikipedia.org/wiki/Hubble%27s_law