We are special in the sense that we can know our place in the cosmos. We can know our place in space. We are at least one of the cosmos's ways of knowing itself. That fills me with reverence and joy. Another insight I really want people to consider is this: everyone has gotten this far. Everyone you meet has made it this far. Nobody is superior to anyone else from an evolutionary standpoint.

But investment in space stimulates society, it stimulates it economically, it stimulates it intellectually, and it gives us all passion.

You and I are made of stardust. We are the stuff of exploded stars. We are therefore, at least 1 way that the Universe knows itself. That, to me, is astonishing.

Bicycling is a big part of the future. It has to be. There's something wrong with a society that drives a car to work out in a gym.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

SCIENCE is a part of EVERYONE'S everyday life.

If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.