Carnegie Mellon engineers develop fall-prevention sensors

Carnegie Mellon University's College of Engineering conducted a survey on falls among the elderly, and discovered that Americans are very worried about their elderly parent falling—and that this worry leads to action.

Cities worldwide dim lights to mark Earth Hour

Cities around the world were turning off their lights Saturday for Earth Hour, with this year's event highlighting the link between the destruction of nature and increasing outbreaks of diseases like Covid-19.

How galaxies and black holes grow together

Over the past two decades, astronomers have concluded that most, if not all, galaxies host massive black holes at their centers—and the masses of a black hole and its host galaxy are correlated. But how are the two connected? ...

New England stone walls deserve a science of their own

The abandoned fieldstone walls of New England are every bit as iconic to the region as lobster pots, town greens, sap buckets and fall foliage. They seem to be everywhere—a latticework of dry, lichen-crusted stone ridges ...

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