snow watermelon (chlamydomonas nivalis), that tints the snow. The pigment, coupled with UV rays, causes the pristine white ice crystals to change color, transforming them into a bona fide tourist ...

The pink color, sometimes called watermelon snow, is caused by Chlamydomonas nivalis algae and related species. C. nivalis thrives in cold water, and “snowfields and glaciers are, in some sense ...