A year is just a quick spin around the sun. A 365-day solar system lap. But in that stretch of time, a lot happens — in space, on Earth, and even inside your body. Your body is constantly at work to keep you alive and kickin', and looking at all the ways your body changes in a single year is both surprising and cool as hell.
That's a Lot of Lost Skin
Oh, But That's Not All
Watch And Learn: Our Favorite Videos On Scientific Views Of Time
How Science Defines A Year
So much happens to the world in a year, and even inside your body.
Key Facts In This Video
In a single year, you'll lose about 4 kilograms (8.8 pounds) of skin cells and 27,000 hairs. 01:28
In a single year, Earth travels 940 million kilometers (584 million miles) around the sun. 02:33
The word "year" comes from the Greek word "hora," meaning season. 03:02
What Will Our Planet Look Like in 100 Years?
Some people may predict it'll look pretty grim, but that may not be the case.
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