Here’s an interesting little factoid for you. The Curiosity rover — which landed last night on Mars, remote controlled by a team of NASA scientists armed with MacBook Pros — runs on a RAD750 radiation-hardened single board computer.
This computer, in turn, is based on the IBM PowerPC 750 CPU, which Intel first introduce on November 10, 1997. This CPU was used by Apple in many computers in the late 1990s, including the original iMac.
As one insightful redditor notes: “Curiosity is essentially a 2-CPU Power Macintosh G3 with some nifty peripherals and one HELL of a UPS.”