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This week in science: Fly migration, a surprise in the Amazon and fish noises

By Berly McCoy,

Regina G. Barber

Published October 3, 2025 at 4:52 PM EDT

Hosts of NPR's science podcast discuss new findings about long-distance fly migration, an unexpected impact of emissions in the Amazon, and fish noises.

Berly McCoy

Kimberly (Berly) McCoy (she/her) is an assistant producer for NPR's science podcast, Short Wave. The podcast tells stories about science and scientists, in all the forms they take.

Regina G. Barber

Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.

Stories From This Author

This week in science: Mystery dots in space, optical illusions and octopus arms

Regina G. Barber

The regular Short Wave science roundup covers mysterious red dots in space, the neurons behind optical illusions and a study of octopus arms.
This week in science: Recycling innovation, scrolling dangers and the inside of Mars

Regina G. Barber

NPR's Emily Kwong and Regina Barber of Short Wave talk about an innovation in plastic recycling, the link between smartphones and hemorrhoids and what Mars' structure and ice cream have in common.
Why some species in the deep sea get bigger, while some species get smaller

Regina G. Barber

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.