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Wrap Up the World of Science With the holiday season finally here, wrap up the world of science and let that special someone explore endless insights with 40% savings on a Digital or Unlimited gift subscription. They'll get access to our biggest stories with the best value of the season. Check out some of our readers' favorite pieces from this year. Save 40% Our Readers' Favorite Stories! New Human Metabolism Research Upends Conventional Wisdom about How We Burn Calories Metabolism studies reveal surprising insights into how we burn calories—and how cooperative food production helped Homo sapiens flourish. Read More   The Asteroid Blast That Shook the World Is Still Making an Impact The Chelyabinsk asteroid slammed into Earth's atmosphere 10 years ago, the largest impact in more than a century. Read More   Crows Perform Yet Another Skill Once Thought Distinctively Human Scientists demonstrate that crows are capable of recursion—a key feature in grammar. Not everyone is convinced. Read More

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