Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is ...

Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory. (Carl Sagan)

Carl Sagan Quotes Pictures

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.

Carl Sagan Quotes: Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.