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This week in science: biker safety, orange cats and a gum disease-heart rhythm link

Emily Kwong and Regina Barber of Short Wave talk about a tool to increase biker safety, the genetic secrets that make orange cats orange, and a link between gum disease and heart rhythm disorders.

Copyright 2025 NPR

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.
Regina G. Barber
Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.
Juana Summers
Juana Summers is a co-host of NPR's All Things Considered, alongside Ailsa Chang, Ari Shapiro and Mary Louise Kelly. She joined All Things Considered in June 2022.