"We don't know how long the Dagwood-sandwich structure would exist. This structure represents a stable state, but various factors could mean the moon doesn't reach this stable state," Dr. Christophe Sotin said in a May 1, 2014 statement. Dr. Sotin is of the JPL.
In the 40 years since they emerged on the market, the choice of options available with respect to Moon Boot features has grown immensely. They now come in a range of outer coverings including suede, nylon jacquard, soft touch nylon, nylon, varnish PU, quilted PU and glitter fabric. Each variety changes the outward look slightly from a matte through to a glossy finish. Personal preference is the only way to make a decision with regard to this feature as they are all exceptional in quality and look.
"The near-side of the Moon has been studied for centuries, and yet continues to offer up surprises for scientists with the right tools. We interpret the gravity anomalies discovered by GRAIL as part of the lunar magma plumbing system--the conduits that fed lava to the surface during ancient volcanic eruptions," Dr. Maria Zuber explained in an October 1, 2014 NASA Press Release. Dr. Zuber is from the Massachusetts Institute of Technology (MIT) in Cambridge.