it's in the universe's best interest to keep us around. We make things fun. 'So what if humans pass into history? 
It's not just a tragedy for us, but also one for nature. Without us, there is no one to witness its infinite beauty; 
no one to marvel at a sunset, revel in a view, or thrill to the breaking of a wave on a beach. 
As the late astronomer and author Carl Sagan once said, "we are a way for the universe to know itself". 
But we also deserve to continue because we have created things greater than ourselves. 
Not only scientific and engineering knowledge, valuable as this is -- 
we have also created new and beautiful ways to see the world through art, music, literature and performance.'"