It's easy to compare space exploration with the history of migration and exploration on Earth. But it's also worth remembering just how risky a proposition this all is, and the humans that are involved. Bert was looking at that Octopus key she found in the woods, and she realized she'd actually seen that same Octopus description on a small plaque near her house. Rebecca Boyle's book isn't out yet, but it's called Walking With the Moon, Uncovering the Secrets It Holes to Our Past and Our Future.