Working with the apple and the seeds, Ms. Mack, who is in charge of most of Donovan's repetition and drilling, marks his responses on a worksheet.
The drilling marks the start of a new period in Curiosity's career on Mars.
Instead it depicts – in a style that is socialist realist in inspiration – the figure of a miner in big boots and helmet, weight behind a drill, marking the passing of the region's bauxite mines, the last of which closed in 1990.
Earlier this week, China's Defence Ministry said the drills marked the navy's "single biggest deployment of military force in a China-foreign joint exercise".
He warned collectors to watch out for overly neat drilling marks, flat bases, cute pronged tails and artificial stains caused by vinegar, peat moss and hydrochloric acid.
Firstly, the implant cavity was constructed by using a 2.0-mm-depth drill after marking the implant site using a guide drill.
But it would require going to a hardware shop, selecting hooks, the appropriate screws and a drill, going home, marking my door, drilling ineptly, screwing screws and then discovering the hooks are still slightly wonky.
Luckily for her, the bones she collected samples from were free from other drill marks, indicating that no other researchers had yet sampled them.
It had been a different story at RAS's zoological museum a few days earlier, where she wasn't allowed to sample the bones she had come for because they were already covered with drill marks from other researchers who, like her, hoped to mine the relatively small number of ancient polar bear samples to reveal their evolutionary history.
The subsequent drill marks would come at 20 inch (50.8 cm) intervals, corresponding with the risers that support the board.
