How smart does a chimpanzee have to be before killing him constitutes murder?

The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us -- there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries.

Extraordinary claim requires extraordinary proof.

We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

I find science so much more fascinating than science fiction. It also has the advantage of being true.

I believe that in every person is a kind of circuit which resonates to intellectual discovery-and the idea is to make that resonance work