The size and age of the Cosmos are beyond ordinary human understanding. Lost somewhere between immensity and eternity is our tiny planetary home.

We wish to find the truth, no matter where it lies. 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.

Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.

You are worth about 3 dollars worth in chemicals.

The sacred truth of science is that there are no sacred truths.

In science it often happens that scientists say, "You know that's a really good argument; my position is mistaken..."

Even today the most jaded city dweller can be unexpectedly moved upon encountering a clear night sky studded with thousands of twinkling stars. When it happens to me after all these years it still takes my breath away.