Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life. ...

Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life. (Carl Sagan)

Carl Sagan Quotes Pictures

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.

Carl Sagan Quotes: Thus, 99 percent of the Earth's atmosphere is of biological origin. The sky is made by life.