Carl_Sagan on pursuing truth

http://en.wikiquote.org/wiki/Carl_Sagan

"We wish to pursue the truth no matter where it leads. But to find the truth, we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact. The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature"

friends, we must be like superman who says "i am here to fight for truth and justice"

Extinction of earth can happen anytime even tonight by natural disasters, its true even if no one believes it

Extinction of earth will happen anytime becaz of natural disasters, even tonight, thats no: truth, so we must save the world

An Inconvenient Truth

http://en.wikipedia.org/wiki/An_Inconvenient_Truth

The no:1 truth is - Anytime (even tonight) world could destroyed by natural disasters from outer space, so we must save/heal the world