THE WOODLANDS, Texas — SpaceX could begin initial tests of a prototype of the company’s next-generation Starship vehicle as soon as this week, Elon Musk said March 17. In a series of tweets, Musk said flights of a “hopper” test vehicle, powered by a single Raptor engine, would “hopefully” begin this week pending work to
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WASHINGTON — A day after announcing that NASA was studying the possibility of shifting an Orion mission from the Space Launch System rocket to commercial vehicles, NASA Administrator Jim Bridenstine said he and the agency still support development of the SLS. Speaking at a Space Transportation Association luncheon here March 14, Bridenstine said the ongoing
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cheerful elderly coupleGetty How lifelong inequalities add up is one of the hottest issues in academic gerontology. A new book from Boston University professor Deborah Carr, the editor-in-chief of Journal of Gerontology, provides a much-needed reality check on the nation’s plans for dealing with retirement. Titled Golden Years? Social Inequalities In Later Life, Carr’s book brings home a
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This article originally appeared in the March 11, 2019 issue of SpaceNews magazine. The U.S. Global Positioning System — the constellation of military satellites that provides positioning, navigation and timing (PNT) services — is the proverbial glass house that was built before the invention of stones, Air Force Secretary Heather Wilson observed last summer when
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Share to facebook Share to twitter Share to linkedin Humans developed tool use some 2.5 million years ago in Africa. The first tools were made from chipped cobbles or larger flakes that had been carefully selected for size and weight. Simple stone tools persisted almost unchanged until about 250,000 years ago, only then more elaborate
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