Season 1 Episodes9
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Ezra Knight
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Ranked #1 of 9 in Season 1•+0.4 vs season avg
Earthquakes can actually affect Earth's gravity, and the ability of scientists to map gravitational fiels has uncovered mysterious anomalies.

Ezra Knight
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"Gravity" is episode 3 of Secrets of the Earth season 1. It scored 7.7/10 from 13 votes, ranking #1 of 9 episodes this season (season average 7.3). It aired on June 13, 2013.