Coloring in the naturally occurring forms, as seen through the eyes of the scientist who inspired the art nouveau movement, will be a perfect left and right-side brain activity for relieving the stress of everyday life.
Ernst Heinrich Philipp August Haeckel was a German biologist, naturalist, philosopher, physician, professor, marine biologist, and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology.