Space on MSN14 天
Food grows better on the moon than on Mars, scientists find
The ground on Mars is full of nitrogen, a vital component for planet life, raising hopes that it might be more hospitable than it appears — but Martian soil is also dense and clay-like, the ...
PBS7 年
The Apollo Missions
Early Apollo Missions: Earth Orbit Apollo missions flew unmanned until October 11, 1968, when Wally Schirra, Donn Eisele and Walt Cunningham orbited the earth for ten days in an Apollo command ...