How lucky we are to live in this time / the first moment in human history / when we are in fact visiting other worlds

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

Chlorine is a deadly poison gas employed on European battlefields in World War I. Sodium is a corrosive metal which burns upon contact with water. Together they make a placid and unpoisonous material, table salt. Why each of these substances has the properties it does is a subject called chemistry.

A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet.

Who are we, if not measured by our impact on others?

Much of human history can, I think, be described as a gradual and sometimes painful liberation from provincialism, the emerging awareness that there is more to the world than was generally believed by our ancestors.

Stars are phoenixes, rising from their own ashes.