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Hyperion, the world's tallest living tree, has suffered as hikers in California's Redwood National Park damaged its habitat. Now, prospective visitors face a $5,000 fine and six months in jail.

David Adam has had obsessive-compulsive disorder for 20 years. In The Man Who Couldn't Stop, he chronicles his experiences — and how medical understanding and treatment of OCD have changed over time.

At the time Charles Dickens wrote A Christmas Carol, a new social science was just taking root: economics. Dickens did not like it. NPR visits a high school performance of the play to understand the economic commentary laced throughout this holiday classic.

Researchers have spent 10 years improving the massive detectors they use to catch shockwaves from colliding black holes, and now the science is precise enough to test one of Stephen Hawking's key ideas.

Humans are notoriously bad at remembering exactly how much we eat and exercise, yet researchers often ask. A new paper says self-reported data have skewed hundreds of studies and must be discontinued.

Andy Samberg, Jorma Taccone and Akiva Schaffer talk about their film, Popstar. Ken Tucker reviews Paul Simon's Stranger to Stranger. Grunt author Mary Roach describes scientific developments of war.

Great pumpkin pie is elusive. You could end up with a soggy crust or a grainy filling. Reporter Maanvi Singh embarked on a months-long quest to crack the code for the ideal pie.

Hops helped make vast fortunes for 19th century farmers and brewers in New York state before a mildew blight ushered in their demise. Now, undergrads hope to develop mildew-resistant heritage hops.

Acting EPA Administrator James Payne sent an email to members of the agency's Science Advisory Board and the Clean Air Scientific Advisory Committee informing them that both are being "reset."

U.S. Olympic heptathlete Annie Kunz says tracking her monthly cycles and learning she needs to eat more and get more naps when she's fatigued has already improved her athletic performance.