Flu cases had previously peaked this season at the very end of December. At week 52 —ending on December 28—the percentage of ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

New work offers insight into how early life adapted from a low-oxygen atmosphere to the one that exists today.

Flu activity is still spiking across the United States as the country faces a winter wave of respiratory illness. The post-holiday surge in influenza cases and hospitalizations is straining ...