In proving that the earth takes a regular beating from space rocks he opened the way for others, in 1980, to find traces of the meteorite that killed the dinosaurs.

ECONOMIST: Gene Shoemaker

They were trying to establish the Space Shuttle as a regular and reliable means of conducting scientific and commercial missions in space.

NPR: Challenger: Reporting a Disaster's Cold, Hard Facts

The tongue, besides being creepy, offers plenty in the way of research opportunities, as you know if you're a regular visitor to this space.

ENGADGET: Electronic tongue tastes, identifies sweeteners so you don't have to