When the Apollo 11 astronauts came back, they had to sign a customs declaration on landing in Hawaii — the cargo listed as "moon rock and moon dust samples," with the departure point given as the Moon (opens in new tab)

On July 24, 1969, three men returned from the most extraordinary journey in human history. Neil Armstrong, Buzz Aldrin, and Michael Collins had flown to the Moon. Two of them had walked on its surface. They had travelled roughly 477,000 miles, round trip, and brought back with them about 22 kilograms of material that had […]