Some of the most fascinating creatures ever to inhabit the Earth can be seen today only in the form of preserved museum specimens.

The Missouri Botanical Garden in St. Louis operates one of the largest and fastest growing herbaria in the world, and the second largest in the western hemisphere. With the addition of a specimen of Anthurium centimillesimum, a gigantic new aroid species from Ecuador, the Garden's permanent collection of pressed and dried plant specimens has reached a milestone of six million specimens.

It appears that chemical warfare has been around a lot longer than poison arrows, mustard gas or nerve weapons – about 100 million years, give or take a little.