Europe swelters in record-breaking June heatwave

Spain, France and other western European nations sweltered over the weekend under a blistering June heatwave that has sparked forest fires and concerns such early summer blasts of hot weather will now become the norm.

When will your elevator arrive? Two physicists do the math

The human world is, increasingly, an urban one—and that means elevators. Hong Kong, the hometown of physicist Zhijie Feng (Boston University), adds new elevators at the rate of roughly 1500 every year...making vertical ...

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