More than 500 years ago, Leonardo da Vinci tried to imagine what it would be like to soar over mountains, to dip, to glide like a bird. He'd sit on Italian hillsides, sketching, imagining, dreaming. In 1502, he drew one of the first ever, looking-down-from-the-sky panoramas of the Earth — in this case a bit of Tuscany, as if seen by a high flying eagle.
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