Ernst Haeckel

Mixing art and Science can be a beautiful thing:
From Art Forms of Nature  by Ernst Haeekel released at the turn of the 20th century- These illustrations are based off of Haeckel's notes and sketches, and hugely influenced the science of documenting species, and also the artists of the era- namely the art nouveau movement. Nature is capable of the most simple, and the most complex of phenomenons- and all art can do is try to recreate the same kind of harmony that nature produces by instinct and grand design.
see the whole work here (in German)
Images via Wikipedia