Inchworming Probe for Planetary Exploration
An anonymous reader writes: "Honeybee Robotics, a firm in New York's Little Italy, has designed a probe that can inchworm deep into the Martian crust or Europan ice shell without a cable to the surface for power or data. Totally autonomous. It's based on a system the company designed to weld steampipes below Manhattan. It's also just really cool."
More info from the company's website here. Includes images and related projects.
This article at spacedaily.com discusses options for cost effective remote unmanned drilling.