TUESDAY: Most of the day is dry but cloudy and cold with a high of 36. Our next system arrives at night. Between 4 p.m. to 7 p.m., snow arrives from SW to NE. Minimal impacts to the evening commute.

Stunning discoveries and fresh breakthroughs in DNA analysis are changing our understanding of our own evolution and offering a new picture of the "other humans" that our ancestors met across ...