Every second, hundreds to thousands of molecules move through thousands of nuclear pores in each of your cells. A new high-definition view reveals the machine in action.

Millions of birds invisibly migrate through the night sky each autumn, most flying in near silence toward their wintering ...

Researchers found that a majority of studies on coastal sea levels underestimated how high water levels are, and hundreds of millions of people are closer to peril than previously thought.

Melatonin and chamomile aren’t enough. Here are 12 sleep techniques most people haven’t tried, ranked easiest to most involved.