Carl Sagan Quote

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to have taken evolution into our own hands.

Broca's Brain: Reflections on the Romance of Science (ed. Ballantine Books, 2011) - ISBN: 9780307800992

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to...

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to...

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to...

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to...