Microplastic fibers (IMAGE) Cell Press Caption This image shows a selection of microfibers found in snow samples from Mt. Everest Balcony (8,440 m), collected during the National Geographic and Rolex Perpetual Planet Everest Expedition, which are consistent with fibers from outdoor clothing. www.NatGeo.com/Everest Credit Imogen Napper/National Geographic Usage Restrictions PERMITTED USE: These images may be downloaded or are otherwise provided at no charge for one-time use for coverage or promotion of the National Geographic and Rolex Perpetual Planet Everest Expedition. Copying, distribution, archiving, sublicensing, sale, or resale of the image is prohibited. REQUIRED CREDIT AND CAPTION: Any and all image uses must (1) be properly credited to the photographer (2) be accompanied by a caption which makes reference to the National Geographic and Rolex Perpetual Planet Everest Expedition including a prominent link to www.NatGeo.com/Everest. Note: If you need unbranded images for print use or high res version for broadcast, please contact Kirsten Weymouth firstname.lastname@example.org. DEFAULT: Failure to comply with the prohibitions and requirements set forth above will obligate the individual or entity receiving this image to pay a fee determined by National Geographic. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.