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LA Times (January 31)

2019/ 02/ 01 by jd in Global News

Though the periodic table may seem “obvious today…it wasn’t to generations of early chemists. One hundred and fifty years ago, “that changed when Dmitri Mendeleev started writing a textbook and pondered ways to group the elements together in order to lighten his load.” The resulting periodic table “has become an icon of science. Its rows and columns provide a tidy way of showcasing the elements — the ingredients that make up the universe.”

 

Chicago Tribune (January 30)

2019/ 02/ 01 by jd in Global News

“This is at least the third polar vortex intrusion Chicago has endured in the past five years, as the cold air mass engulfed the area in January 2014 and February 2015. As temperatures in the Arctic continue to rise, polar vortex intrusions could become more common in the Midwest and the Northeast.”

 

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