Talks on global plastic treaty begin in Canada

Negotiators from 175 nations began talks Tuesday on a proposed global treaty to reduce plastic pollution, which is found everywhere from mountain tops to ocean depths, and in human blood and breast milk.

The guardian angels of the source of the Seine

The river Seine, the centerpiece of the Paris Olympics opening ceremony in July, starts with a few drops of water in a mossy grotto deep in the woods of central France.

NASA's CloudSat ends mission peering into the heart of clouds

CloudSat, a NASA mission that peered into hurricanes, tallied global snowfall rates, and achieved other weather and climate firsts, has ended its operations. Originally proposed as a 22-month mission, the spacecraft was recently ...

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