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In this Thursday, Sept. 19, 2019 file photo, Amazon CEO Jeff Bezos walks off stage after holding a news conference at the National Press Club in Washington to announce the Climate Pledge, setting a goal to meet the Paris Agreement 10 years early. (AP Photo / Pablo Martinez Monsivais)

The world’s richest man, Amazon founder Jeff Bezos, said in an Instagram post that he’ll start giving grants this summer to scientists, activists and nonprofits working to protect Earth.

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An artist’s concept of an O’Neill cylinder. (Courtesy Blue Origin)

Could Jeff Bezos’ vision of giant rotating habitats one day support millions of people in space? We speak with two experts about humankind’s future in space. 

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SpaceX's Falcon 9, left, and Blue Origin's New Shepard. (SpaceX / Flickr, Franke360 / Wikimedia)

Tech billionaire Elon Musk wants to create a colony on Mars. Assessing the challenges–and his chances of success.

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SpaceX's Falcon 9, left, and Blue Origin's New Shepard. (SpaceX / Flickr, Franke360 / Wikimedia)

Last month, Elon Musk's SpaceX successfully landed one of its Falcon 9 rockets back onto its launch pad. In November, Jeff Bezos’ company Blue Origin landed its sub-orbital capsule New Shepard. Space enthusiast and Fermilab physicist Don Lincoln recently wrote a column on the Musk versus Bezos competition and shares his insights.

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Joel Weisman and his panel of journalists take on changes in journalism in this web extra conversation. Was the sale of The Washington Post to Jeff Bezos a vanity purchase? And what changes are ahead at the Sun-Times and Crain’s? Watch the web extra video.

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In a whirlwind week for newspapers, Amazon founder Jeff Bezos plans to buy The Washington Post for $250 million, while Boston Red Sox Owner John Henry has purchased The Boston Globe from the New York Times Company. We discuss the future of the newspaper industry in light of the sales.

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