ddt

Spermicide' sort of rhymes with 'pesticide', yet you wouldn't put a load of DDT in you know where to kill you know what, now would you?

Histories of the Kennedy Space Center acknowledge without exaggeration that the obstacle posed by the mosquitoes was so serious that NASA quite literally could not have put a man on the moon by Kennedy's "before the decade is out" deadline without the invention of DDT. In this way, the challenges of spaceflight reveal themselves to be distinctly terrestrial.