Old Mister Mallard, Part 8

Old Mister Mallard feels motivated to work out every once in a while, and, when he does, he uses an exercise bike that's been in the backyard of his farmhouse longer than even he's been living there. In reality, this bike is anchored to the ground and has cables running from its front wheel to a subterranean system of gears directly coupled to the secret gyroscope at the center of the Earth. Every 20-min of Old Mister Mallard's workout adds 5 seconds to the year. Scientist chalk it up to dark matter, but those extra hours are just Old Mister Mallard getting in shape.