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U.S. Astronauts on 'Critical' Spacewalk to Replace Power Box

Two U.S. astronauts embarked Tuesday on what NASA described as a "critical" spacewalk to repair a failed piece of equipment that helps power the International Space Station.

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Open SESAME: Science Center Inaugurated in Jordan

Jordan's King Abdullah II on Tuesday formally launched an international research center whose members include experts from around the world including arch-rivals Iran and Israel.

The International Center for Synchrotron-Light for Experimental Science and Applications in the Middle East, known by the acronym SESAME, "is the first research center of its kind in the region," said the royal court.

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China Tests 'Lunar Palace' as it Eyes Moon Mission

Chinese students will live in a laboratory simulating a lunar-like environment for up to 200 days as Beijing prepares for its long-term goal of putting humans on the moon.

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Cassini Probe Finds Vast Void between Saturn's Rings

The unmanned Cassini spacecraft, after completing two passes in the vast, unexplored area between Saturn's rings has discovered not much else there, researchers at NASA said. 

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A Spanish Quest to Hand Down Prehistoric Secrets

It's dark and surprisingly warm in a cave in western Spain that hides our most intimate connection to the prehistoric past -- hand silhouettes painted tens of thousands of years ago.

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SpaceX Launches Top-Secret Spy Satellite for US Government

SpaceX has launched a top-secret spy satellite for the U.S. government.

The unmanned Falcon 9 rocket lifted off Monday morning from its NASA-leased pad at Kennedy Space Center in Florida. It hoisted a classified satellite for the National Reconnaissance Office.

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Thousands Join March for Science to Fight 'Alternative Facts'

Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight against what many see as an "assault on facts" by populist politicians. 

U.S. President Donald Trump himself passed dozens of protesters on his way to visit wounded soldiers at a military hospital.

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March for Science Not about Trump, Organizers Say

Budget cuts and political assaults on science are expected to draw thousands of demonstrators to the streets in more than 500 cities worldwide Saturday for the first March for Science.

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China Launches First Cargo Spacecraft Tianzhou-1

A Chinese rocket successfully sent the country's first cargo spacecraft, Tianzhou-1, into space from the southern island province of Hainan Thursday. 

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Russian, American Two-Man Crew Blasts off to ISS

A Russian and an American blasted off from the Baikonur cosmodrome in Kazakhstan on Thursday, the first two-person launch to the International Space Station in over a decade. 

The Soyuz MS-04 spacecraft carrying veteran Russian cosmonaut Fyodor Yurchikhin and NASA rookie Jack Fischer shot into the sky in bright conditions at 0713 GMT.

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