The Mars Science Laboratory (MSL), aka the Curiosity Rover is something of a robotic geologist, so it makes sense to include the tools of the trade in some form, including a calibration target. For giving a sense of scale with smaller geologic features, pennies are often used for scale, as a common item with a standard dimension. But why is there a 1909 penny on the Rover? That's thanks to Kenneth Edgett, the Mars Hand Lens Imager (MAHLI) principal investigator and an amateur coin collector who appreciates the history of the controversial 1909 V.D.B. Lincoln Cent.
That rover the United States sent to Mars found something. It won't blow your mind, but it's interesting if you're into Mars geology.
Let's take another look at Chris Wayan's PLANETOCOPIA (previously): A series of detailed conceptions and paintings of vastly different Earths based on differing climates and land mass position. A planet designed to speed up East-West cvilization development! A life-bearing super hot world! An Earth with most of the seas missing! Forever Ice Age Earth! [more inside]
Next Thursday, NASA will announce the discovery of huge water ice oceans on Mars. Lying less than a metre beneath the surface south of 60° latitude, the water ice reservoirs if melted would form an ocean 500m deep covering the entire planet. NASA insiders believe these findings could result in a manned landing within 20 years.