Woman holding her hand to her ear to listen to a distant sound.

---

Size: 3159px × 4363px
Photo credit: © OSCAR BURRIEL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: alga, algae, aquatic, background, biological, biology, blue, botanical, botany, contrast, dic, differential, euglena, flora, freshwater, interference, lepocinclis, light, micrograph, microorganism, nature, photomicrograph, protist, single-celled, spirogyroides, unicellular