Study lists world's 'forever chemical' hotspots

Dangerous concentrations of long-lingering "forever chemicals" have been found in surface and groundwater worldwide, according to a study released Tuesday that showed Australia, the United States and Europe as hotspots.

New model clarifies why water freezes at a range of temperatures

From abstract-looking cloud formations to roars of snow machines on ski slopes, the transformation of liquid water into solid ice touches many facets of life. Water's freezing point is generally accepted to be 32 degrees ...

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