sci-universe:Each fall, millions of North American monarch butterflies migrate to California and Mexico for winter. They make a massive journey (up to 4,830 kilometers/3,000 miles) and use the sun to ensure that they stay on course. On cloudy days Earth’s

sci-universe:Each fall, millions of North American monarch butterflies migrate to California and Mexico for winter. They make a massive journey (up to 4,830 kilometers/3,000 miles) and use the sun to ensure that they stay on course. On cloudy days Earth’s

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from: https://naoooky.tumblr.com/post/114991054973