Ernst Haeckel was a German biologist, philosopher, and artist born on February 16, 1834, in Potsdam, Germany. He studied medicine and natural sciences at the University of Berlin and later became a professor of zoology at the University of Jena. Haeckel is best known for his work in the field of evolutionary biology, where he coined the term "ecology" and proposed the concept of the "tree of life." Aside from his scientific contributions, Haeckel was also an accomplished artist, creating intricate and detailed illustrations of marine organisms. His artwork was not only aesthetically pleasing but also scientifically accurate, and he published several books featuring his illustrations, including "Art Forms in Nature" and "Kunstformen der Natur." Haeckel's work had a significant impact on the fields of biology and art, and his legacy continues to inspire scientists and artists alike. He passed away on August 9, 1919, in Jena, Germany, at the age of 85.