"During the day, the temperature on the Red Planet can fluctuate by up to 38°C. The added heat can cause the metal on Perseverance's robotic arm to expand and contract by up to 13 millimetres"
Expansion of 13 millimeters over a temperature differential of just 38°C? doesn't that seem a little extreme? I would expect a deviation of around 1.3 mm not 1.3 cm.