This animation shows why leap years are necessary. Without them, December would eventually drift into summer.

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earth in space with swirling clouds green and brown continents overlaid with giant calendar illustration showing February 29
Leap Day is coming up and its purpose is to keep our seasons in check.

Norman Kuring/NASA/GSFC/Suomi NPP; bgblue; Business Insider

The director of Oscar-nominated 'Turning Red' shares how she moved up through the ranks at Pixar from intern to VP of creative

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headshot of Domee Shi
Domee Shi.

Courtesy of Domee Shi

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