This undated photo shows an iced-up plant in New Paltz, NY. Winter ice can break plant and human limbs. Rock salt, which can be damaging to plants, is not the only way to clear it from paths. (Lee ...

Humans have been harvesting salt since prehistoric times. In this kitchen-science experiment from ATK Kids — the children's website of America's Test Kitchen — chunky flakes of salt appear as a ...

More than a billion years ago, in a shallow basin across what is now northern Ontario, a subtropical lake much like ...