PET is a polymer of ethylene glycol and terephthalic acid. Pellets of PET resin are heated to a molten liquid, which can be easily extruded or molded into almost any shape. PET was first synthesized in the U.S. during the mid-1940s by DuPont chemists searching for polymers that could be used to make new textile fibers.
It is derived literally from the word 'carino' which means pretty, cute. The name Carina (Italian) is the female version of Carino. Carino is unusual as a baby name for boys.
A crinoid has three parts, a stem which it uses to stick to the sea floor, a calyx or body, and its arms which it uses to catch its food. Usually it's the stem which is found as a fossil, but on the left you can see some fossil crinoid arms. On the right are some living crinoids.