Whether it's electric lights, addiction to digital devices, or just the fast pace of modern life, one thing is clear: it seems to be getting harder to get a good night's sleep. Almost 50 percent of Americans say they can't get the zzz's they need. To understand why many are sleep deprived, take a deep dive into the body's control center, the brain, and follow the work of researchers who are unraveling the secrets of sleep.

Einstein called it 'spooky action at a distance, ' but today quantum entanglement is poised to revolutionize technology. Physicists have become gradually convinced that quantum entanglement is real, but a few doubts remain. NOVA follows a groundbreaking experiment in the Canary Islands to use quasars at opposite ends of the universe to once and for all settle remaining questions.

The California wildfires of 2018 took a worrisome trend to a new extreme, claiming lives and over a million acres. Scientists investigate how forestry practices, climate change, and drought may contribute to the rise of deadly megafires.

How do you stop a contagious killer microbe? Scientists around the globe are racing to uncover the secrets of the coronavirus behind the COVID-19 pandemic--and using revolutionary techniques to develop lifesaving treatments and vaccines.