NASA: Red Planet looks a little gray inside, USA Today
"This is the first time any robot has drilled into a rock on another planet," says mission sample chief Louise Jandura of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Calif."
Luna 16, WIkipedia
"At perilune at 05:12 UT on 20 September , the main braking engine was fired, initiating the descent to the lunar surface. ... Less than an hour after landing, at 06:03 UT, an automatic drill penetrated the lunar surface to collect a soil sample. After drilling for 7 minutes, the drill reached a stop at 35 centimeters depth and then withdrew its sample and lifted it in an arc to the top of the spacecraft, depositing the lunar material in a small spherical capsule mounted on the main spacecraft bus."
Keith's note: So, is this JPL statement about the whole (increasingly pointless) "planet" Vs "moon" or a "rock> Vs "soil (regolith)" definition issue - or are they actually unaware of what Luna 16 (and 20) did 40+ years ago?
Curiosity Rover Drilling Debate, earlier post