Science

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Tested: Questions of a Physical Nature

Episode 2: We go back almost 100 years, to the beginning of women's inclusion in elite sports. It turns out that men had an odd variety of concerns about women athletes. Some doubted these athletes were even women at all. And their skepticism resulted in the first policies requiring sex testing. To listen to this series sponsor-free and support NPR, sign up for Embedded+ in Apple Podcasts or at plus.npr.org.
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Synchronous fireflies, known as Photuris frontalis, blink in the woods near the Congaree River on Wednesday, May 15, 2024, in Columbia, S.C.

The magic — and science — of synchronous firefly displays

Every year for two weeks between mid-May and mid-June, Congaree National Park in South Carolina is home to a fairy-tale-like display of flashing lights. These rhythmic performances happen all because of thousands of fireflies, flashing their belly lanterns at exactly the same time. According to the National Park Service, there are just three types of these synchronous fireflies in North America, making the experience all the more magical for the lucky visitors who get the chance to see them.

Firefly scientists and enthusiasts hope these displays in places like Congaree will inspire people to care about other kinds of fireflies, also known as lightning bugs, in the U.S., which are not as well-studied – or well-protected – as synchronous ones. Some community scientists are already taking on this mission with projects like the Firefly Atlas, where volunteers can help survey for fireflies and report sightings.

This story was originally reported for NPR by science correspondent Pien Huang. Read Pien's full story here.

Want more of the science behind wildlife wonders? Email us at shortwave@npr.org.
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NASA's Wide Field Infrared Survey Telescope is set to launch in 2027. This innovative telescope is designed to investigate long-standing astronomical mysteries, such as dark energy, the force behind the universe's expansion.

This mysterious energy is everywhere. Scientists still don't know what it is

The universe — everything in existence — is expanding every second! It's only been about a hundred years that humanity has known this, too — that most galaxies are traveling away from us and the universe is expanding. Just a few decades ago, in the late 1990s, scientists started to notice another peculiar thing: The expansion of the universe is speeding up over time. It's like an explosion where the debris gets faster instead of slowing down. The mysterious force pushing the universe outward faster and faster was named dark energy. Cosmologist Brian Nord joins host Regina G. Barber in a conversation that talks about what dark energy could be and what it implies about the end of our universe.

Check out more of our series on space at https://www.npr.org/spacecamp.

Curious about other happenings in our universe? Email us at shortwave@npr.org.
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