Earth is running a fever. That's not news ... But Rik, if you zoom out of the graph to view the lines over centuries, doesn't the Earth go through these ups and downs all the time?

Yellow fever appeared in the U.S. in the late 17th century. The deadly virus continued to strike cities, mostly eastern seaports and Gulf Coast cities, for the next two hundred years, killing ...

Citing research that the more common average body temperature of today is actually 97.9, she mused: "Should we adjust our idealization of when a fever actually happens? I have a normal body ...