Science & Nature Grayscale Adult Coloring Book has original illustrations by Ernst Haeckel. Ernst lived from 1834 to 1919. This coloring book contains drawings of wildlife, plants & flowers, bugs, landscapes, science specimen plates, and more. Some of the images are mandala-like as well. This book can be colored with a wide and colorful variety of pencils and markers. Use bright or muted colors on any of the pictures. Make your coloring pages come to life with your bright imagination.This grayscale coloring book includes- 1. 30 high-quality grayscale coloring pages. 2. 8.5" x 11" pages. 3. All pages are single-sided.4. A special coloring page with the image of Ernst Haeckel in action. More coloring books to come! Enjoy your coloring journey!If you have a picture of someone special or a wonderful pet you would like made into grayscale coloring pages please contact me.Please contact me at JoyfulColoringBooks@gmail.comSee the flip-through of the coloring pages on YouTube - YouTube.com/channel/UCroL0Govs-YVWAJlOhm4_XA/videos