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Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the
See: *winter* page
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link to video
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National Wildlife Federation webpage
book info excerpt: Delaware Bay is home to the world’s greatest concentration of horseshoe crabs. On this beach, they came by the thousands, gliding effort-lessly through the water, then burrowing in the sand. When the tide turned,
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Sunrise equation - Wikipedia
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After millions of years passed enough matter collided to gain mass and its own gravity and become small versions of planets called planetessimals and protoplanets. These pre-planets collided to create even larger planets. This set the stage for
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book info - 2021 excerpt: In the past two decades, science’s understanding of migration—of the mechanics that allow a bird, alone and on its first journey, to find its way across the globe in the face of crosswinds, storms, and exha
full text
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full text
6 min. video
link to webpage
See *marrow* page.
See *marrow* page.
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