This week’s roundup dives into Mars’s lumpy mantle, a nasal spray that may help prevent COVID and the growing confusion around vaccine access in the U.S. Plus, researchers link phone use while on the toilet to hemorrhoid risk, uncover ancient mammoth microbiomes and explain why squirrels’ thumbnails matter more than you think.

Recommended Reading
<a href="https://www.scientificamerican.com/article/who-is-eligible-for-the-covid-vaccine-in-2025-and-how-to-get-it/">Can You Get a COVID Vaccine This Year? Here’s What We Know</a>
<a href="https://www.scientificamerican.com/podcast/episode/inside-the-cdcs-breakdown-legal-battles-staff-exodus-and-public-health/">Experts Warn of Growing Threats amid CDC Resignations</a>
<a href="https://www.scientificamerican.com/article/new-nasal-vaccines-offer-stronger-protection-from-covid-flu-and-more-no-needle-needed/">New Nasal Vaccines Offer Better Protection from COVID and Flu—No Needle Needed</a>

E-mail us at <a href="mailto:sciencequickly@sciam.com">sciencequickly@sciam.com</a> if you have any questions, comments or ideas for stories we should cover!
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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper and Jeff DelViscio. This episode was edited by Alex Sugiura. Shayna Posses and Aaron Shattuck fact-check the show. The theme music was composed by Dominic Smith. Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

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