Term
Viking
Two American spacecraft that reached orbit around Mars in 1976 and set landers down on its surface.
The Demon-Haunted World: Science as a Candle in the Dark, Carl Sagan
Explained in
- The Demon-Haunted World: Science as a Candle in the Dark, Carl Sagan
- Cosmos, Carl Sagan
Two American spacecraft that landed on Mars in 1976 and, among other things, searched there for signs of life.