Menu items are color coded to signify most healthy and least healthy choices, and each day the kitchen displays a sampleplate that benchmarks an appropriate portion for a 200 pound male.
The sample comes from a hole about 2.5 inches deep drilled on Feb. 8 in a flat plate of sedimentary bedrock that the space agency managers have named "John Klein" in memory of a Mars Science Laboratory deputy project manager who died in 2011.