alchymista: Coccolithophores Tiny coccolithophores have had a big impact on the planet over time. Though they are single-celled, these photosynthesising organisms are enclosed in a mosaic, or cage, of microscopic plates that make many very beautiful to look at. The plates are made of calcium carbonate, which the coccoliths pull from the... - http://strickn.tumblr.com/post...