Earth’s Tilt Makes Time Slippery

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A sundial can be almost 16 minutes fast in November and 14 minutes slow in February, yet there's nothing wrong with it. So why does the Sun, our oldest timekeeper, disagree with the clock on your wrist? In this episode, Professor Hannah Fry and Michael Stevens (Vsauce) explore the equation of time - the strange relationship between Earth's tilt, its orbit around the Sun and the way we measure our days. Why does a day last 24 hours? Has it always been that way? And how can a piece of ancient…