Early this year, a surprise space rock made headlines around the globe when the International Asteroid Warning Network ...

A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.

We're almost through Week 14 of the 2025 NFL season, the playoff picture and the road to Super Bowl LX are starting to come into view. Which teams have the best chances to make the 14-team playoff ...