The physics behind Santa Claus
NPR's Ayesha Rascoe speaks with Norwegian scientist Gaute Einevoll about the physics behind Santa Claus.
Science
P-22, Hollywood's famous mountain lion, is euthanized after suffering injuries
For years, the wild mountain lion's presence in LA captured the adoration of the city's residents. Wildlife officials said they "compassionately euthanized" the ailing animal on Saturday.
Perceiving without seeing: How light resets your internal clock
We mark our days by sunlight, with special receptors in our eyes that respond to light and help reset our body clocks each day. This man can't see, but is still a circadian wiz. Here's how.
The Keystone pipeline leaked in Kansas. What makes this spill so bad?
The cause for the spill is still unclear. What's known is the type of oil that was piped: tar sands oil, also called diluted bitumen. It's a lot harder to clean up than conventional oil.
Researchers say time is an illusion. So why are we all obsessed with it?
Even guardians of America's atomic clocks say time doesn't work the way we think it does.
Law requires former research chimps to be retired at a federal sanctuary, court says
The ruling is the latest twist in a long-running dispute over where dozens of federally-supported former research chimps should live out the remainder of their days.
Physicists are still trying to understand time
Scientists at the National Institute of Standards and Technology track time with atomic clocks. But what is time, really? Physicists are still trying to answer that question.
How close are we actually to fusion energy powering society?
Fusion energy has remained a distant dream for decades, but scientists announced they got more energy back than they put in to create the reaction. How close are we to fusion energy powering society?
Tips to keep you and your family safe from the tripledemic during the holidays
NPR asked a handful of public health experts how to approach a holiday season with not one but three respiratory pathogens helping fill hospitals: COVID, the flu and RSV.
How did COVID warp our sense of time? It's a matter of perception
Many people reported a distortion in their sense of time during the pandemic, but the individual experience is highly dependent on a range of factors from emotional state to culture.