Drake Equation T-Shirt for SETI Institute

By SETI

$ 25.00

NOTE: Some items marked as Back-Order may be in stock and ship asap. If it s out-of-stock your item will ship in late April.

N = R* • fp • ne • fl • fi • fc • L. The Drake Equation was first presented by Frank Drake in 1961 and identifies specific factors thought to play a role in the development of extra-terrestrial civilizations. Get the tee and help spread the word that thanks to numerous advancements in technology; we are finally putting down hard numbers where once there were only variables.