5 biggest discoveries of Carl Sagan ㅤㅤ

"Let the future tell the truth and evaluate each one according to his work and accomplishments. The present is theirs; the future, for which I really worked, is mine."
| Nikola Tesla

Have you ever wondered, that maybe, the universe which we live in could be just another brain cell to a larger living being?

Numbers exist only in our minds. There is no physical entity that is number 1. If there were, 1 would be in a place of honor in some great museum of science, and past it would file a steady stream of mathematicians gazing at 1 in wonder and awe.

— John B. Fraleigh, mentioned in Linear Algebra (1995)

"We're like butterflies who flutter for a day and think its forever."
| Carl Sagan

Why can't we see air?
In order to see something, it needs to interact with light either by absorbing, scattering, reflecting or refracting. Air is composed of various gases and as we already know, the molecules of gases are loosely packed so the light passing through the air has a little chance of interacting with air molecules. Hence, the air is effectively not able to reflect the light.