Da Vinci’s Parachute

Da Vinci’s Parachute

Leonardo da Vinci was a mind ahead of his time. He didn’t live to see the realization of most of his thousands of pages of inventor’s notes and sketches, but his vision was practical and insightful. Modern experimenters have used updated materials and technology to bring many of his designs to life. His innovations in

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Experimenting with Hand Warmers: Its Hot

Experimenting with Hand Warmers: Its Hot

 Your body knows that internal organs are more vital than, say, fingers and toes. In cold weather, it wouldn’t be very efficient to pump warm blood to the outside of your body, because then the heat could easily radiate away! Conserving warmth in your core is a great survival tactic, but it’s uncomfortable for

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