Explorers Logan and Sophie take a ride on a fairground carousel and find out why we have night and day.

Originally released by BBC, 2013. Streaming video file encoded with permission for digital streaming by Infobase on November 17, 2016.

Meet the Neurons (0:55); --Why Do We Have Night and Day? (2:16); -- Senses Experiment (4:06); -- Earth's Rotation Around the Sun (4:39); -- Summary: Why Do We Have Night and Day? (0:26); -- Credits: Night and Day—Nina & the Neurons: Earth Explorers (1:32); -- Day and Night Cycle (2:53); .