True human progress, that which can be linked to evolution, and which prolongs it, can only consist in perfecting and ameliorating man himself and not in improving the tools he employs, nor in increasing his physical well-being — Dr Carl Sagan Copy Share Image
The Universe forces those who live in it to understand it. Those creatures who find everyday experience a muddled jumble of events with no… — Dr Carl Sagan Copy Share Image
There are many hypotheses in science which are wrong. That's perfectly all right; they're the aperture to finding out what's right. Science is a… — Dr Carl Sagan Copy Share Image
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken', and then they would actually… — Dr Carl Sagan Copy Share Image
A galaxy is composed of gas and dust and stars - -billions upon billions of stars — Dr Carl Sagan Copy Share Image
Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgment, the manner in which information… — Dr Carl Sagan Copy Share Image
... the use of our intelligence quite properly gives us pleasure. In this respect the brain is like a muscle. When we think well,… — Dr Carl Sagan Copy Share Image
For most of human history we have searched for our place in the cosmos. Who are we? What are we? We find that we… — Dr Carl Sagan Copy Share Image
True human progress, that which can be linked to evolution, and which prolongs it, can only consist in perfecting and ameliorating man himself and… — Dr Carl Sagan Copy Share Image
