This is the embryo of a veiled chameleon (Chamaeleo calyptratus) that’s been stained to visualize its developing skeleton. Its bones are red (1), the cartilage is blue (2), and some of its developing ...

Click on the right arrow to see other skeletal structures, as well as multiple diatoms stacked on top of one another. Biology in the background Diatoms are microscopic single-celled algae that live in ...