Teachers can use this image to teach children about the history of snowflake exploration and to introduce snowflake science and snowflake illustration.
Acanthophracta: Wunderstrahlinge (Protozoa: Radiolaria)
Radiolaria are minute creatures, 1/1000 of an inch in diameter.
Haeckel drew these creatures while looking through a microscope. See more images at Ernst Haeckel: Art Forms in Nature