National Interest on MSN1 小时
The U.S. Air Force Went to Space on the North American X-15
The X-15 is the only conventional aircraft that has ever been flown above the “Karman Line” separating the Earth’s atmosphere ...
Space.com15 小时
'Roasting marshmallow' exoplanet is so hot, it rains metal. How did it form?
"The climate of this planet is extreme and nothing like that of Earth. The planet's dayside is so hot that elements typically thought of as 'metal' are vaporized into the atmosphere." ...
Washington Park branch of Urban Ecology Center reopens with inclusive space, more programs
With an observation deck, all the essentials to enjoy the outdoors and a few surprises, Milwaukee’s Urban Ecology Center ...