Humans have a tendency to tromp all over things, even when we’re trying to be careful.Humans have a tendency to tromp all over things we haven’t yet assigned a specific value, even when we’re trying to be careful. But an increased sense of conscience about the Apollo sites recently spawned a bill to preserve them. The proposal, put before Congress this past summer, is to eventually nominate them as UNESCO World Heritage sites. It’s not perfect. First, under the Outer Space Treaty of 1967, accepted by 101 countries, no nation can claim the moon as sovereign territory, an official prerequisite for nomination. And the bill doesn’t cover the rest of the moon—only where the astronauts landed and worked.