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Bill Nye the Science Guychevron_right
S04E20: TimeTime affects every living thing on Earth. Trees shed their leaves. Some animals only come out at night. There are even insects that only emerge every 17 years. Days, hours, minutes, and seconds – all of these were invented by humans. Humans came up with these units of time to organize their lives and to study the world. One of the first ways humans told time was by noticing the difference between daytime and nighttime. Humans use the Earth revolving around the Sun to divide time into years and seasons. Months are based on the movement of the Moon around the Earth. A day is when the Earth spins completely around its own axis.
Genres:
Air Date:
Sep 12, 1997
Runtime:
26 minutes
Production:
Casts:
Bill Nye, Rachel Glenn, Jennifer Lin, Amy Broder, Ethan Ferkiss
