How Long Is a Year?: The Relativity of Time

As things age, each trip around the sun becomes an ever-shrinking percentage of its lifetime. Think about this: The average first grader is six years old when the school year starts. One year to them feels like one million years does to the Grand Canyon—for both, it’s one-sixth of their time on Earth. So how do you measure a year?

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Producer/Video by:
Jason Lederman

Research/Narrator:
Sophie Bushwick

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