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Someone on the International Space Station suffered an unspecified “medical situation” Wednesday, prompting the postponement of a planned spacewalk and raising the possibility of an early return for a portion of the lab’s seven-person crew, NASA said in a statement. NASA has never ordered a medical evacuation from space before,…

Michael Derrer Fuchs/Getty iPhones have been released like clockwork, year after year, for over a decade now. The launch of the iPhone X alongside the iPhone 8 and iPhone 8 Plus models in 2017 introduced us to a release cycle where Apple started pushing new phones across different product tiers…

A new study by mathematicians at Freie Universität Berlin shows that planar tiling, also known as tessellation, is far more than a decorative technique. Tessellations cover a surface with one or more geometric shapes without gaps or overlaps, and the researchers demonstrate that these structures can serve as precise tools…