The first spacecraft to explore the space beyond Earth orbit was Pioneer 4 in 1959. Twenty-five years later, in 1984, astronomers Carl Sagan and Jill Tarter…
Rare Earth hypothesis: Why we might really be alone in the universe
Posted in space travel
Posted in space travel
The first spacecraft to explore the space beyond Earth orbit was Pioneer 4 in 1959. Twenty-five years later, in 1984, astronomers Carl Sagan and Jill Tarter…