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Earth’s Axis Tilts 90°: A World Turned Sideways
"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey ...
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For children: The universe tells the story of Earth, its most special planet
First, let us talk about an axis. An axis is like an invisible stick ... Excerpted with permission from I Am the Universe: The History and Future of the Cosmos, Srijan Pal Singh, Penguin India.