Carl Sagan was the David Duncan Professor of Astronomy and Space Sciences and Director of the Laboratory for Planetary Studies at Cornell University. He played a leading role in the Mariner, Viking and Voyager missions to the planets and briefed the Apollo astronauts before their flights to the Moon. He helped solve many mysteries in planetary science from the high temperature of Venus to the seasonal changes on Mars. For his unique contributions, he was awarded the NASA Medals for Exceptional Scientific Achievment and for Distinguished Public Service (twice), as well as the Tsiolkovsky Medal of the Soviet Cosmonautics Federation, the John F. Kennedy Award of the American Astronautical Society and the Arthur C. Clarke Award for Space Education.

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In 2002, World of Books Group was founded on an ethos to do good, protect the planet and support charities by enabling more goods to be reused. Since then, we've grown into to a global company pioneering the circular economy. Today, we drive the circular economy through three re-commerce brands: - Wob: Through Wob, we sell. We provide affordable, preloved books and media to customers all over the world. A book leaves our collection of over seven million titles and begins a new chapter every two seconds, enabling more goods to be reused. - Ziffit: Through Ziffit, we buy. We give people around the world the opportunity to contribute to the circular economy, earn money and protect the planet, by trading their unwanted books and media. - Shopiago: Through Shopiago, we help others. By sharing the technology that has grown World of Books Group into the business it is today, we?re helping charities increase revenue and reduce waste through re-commerce.

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