Dr. Carl Sagan

You have to know the past to understand the present.

You have to know the past to understand the present.

I also wish that the Pledge of Allegiance were directed at the Constitution and the Bill of Rights, as it read more

I also wish that the Pledge of Allegiance were directed at the Constitution and the Bill of Rights, as it is when the President takes his oath of office, rather than to the flag and the nation

The Universe forces those who live in it to understand it. Those creatures who find everyday experience a muddled jumble read more

The Universe forces those who live in it to understand it. Those creatures who find everyday experience a muddled jumble of events with no predictability, no regularity, are in grave peril. The Universe belongs to those who, at least to some degree,

It is of interest to note that while some dolphins are reported to have learned English - up to fifty read more

It is of interest to note that while some dolphins are reported to have learned English - up to fifty words used in correct context - no human being has been reported to have learned dolphinese.

There are many hypotheses in science which are wrong. That's perfectly all right; they're the aperture to finding out what's read more

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 self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.