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This week in science: Recycling innovation, scrolling dangers and the inside of Mars

By Regina G. Barber,
Emily Kwong
Published September 4, 2025 at 2:50 PM PDT

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.

Copyright 2025 NPR
Tags
Science
Regina G. Barber
Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.
Emily Kwong
Emily Kwong (she/her) is the founding reporter and now co-host for Short Wave, NPR's daily science podcast. Her first homework assignment in kindergarten was to bring in a leaf to class. She's been looking at trees ever since.
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