The radiating, kaleidoscopic pattern you see here was once the living glass skeleton – the cell wall – of a single-celled organism called a diatom. These organisms absorb silicon from their ...

The leaves and flowers of plants are all formed of a frame-work, beautiful and delicate in the extreme, composed of woody fiber, corresponding to the skeleton of animals; and between the ...

This vivid chameleon embryo has been stained to highlight the bones and cartilage of its skeleton. You can also see some of its developing internal organs. This vivid chameleon embryo has been stained ...