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Halley’s comet cannot be tracked by GPS as it is out of range of the GPS satellites. Besides, getting a GPS tracker onto the comet could prove quite tricky! Lindsay Lohan and polar bears have both been tracked by GPS (though not in the same place at the same time).
Play Time Twins and experience General Relativity in action as you battle aliens to save your twin back on Earth before he gets old and smelly.Find out more
What is your preferred method of navigation?