Please
these sources
The beautiful image on the home page is from Dr. Juan Pedro Mellado, and was published in a scientific journal. The full citation is as follows:
Mellado, J.P. (2010) The Evaporatively Driven Cloud-Top Mixing Layer. Journal of Fluid Mechanics 660 (2010): 5–36. DOI: 10.1017/S0022112010002831
Check his website, you can find more images and links to some wonderful animations of real turbulence research!
The ‘page not found’ on Plankton Science shows Otto the Copepod, a character from a story created by researcher and artist Jan Heuschele.
Check his website, he has lots of beautiful material about Science + Illustration!