4 ms·

Several hundred kilograms of lunar rocks.

• pfdietz 4y ago
  Lunar samples could have been returned by unmanned vehicles at a fraction of the cost of Apollo. The Russians did just that! Maybe not hundreds of kilograms, but enough to get the major science results (moon is evolved not primitive, oxygen isotopes, volatile depletion, europium anomaly). Unmanned vehicles could even have reached the polar regions, which Apollo never could do.