30
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
1309535
103051
2

jan 6, 1939 - Dichloro-diphenyl-trichloroethane (DDT) discovered as antimalarial AND mosquito repellant, 1939 Othmer Zeilder

Added to timeline:

22 Jun 2018

Date:

jan 6, 1939
Now
~ 85 years ago