Born 216 years ago today, British botanist Anna Atkins is credited with authoring the world's first photographic book. Photographs of British Algae: Cyanotype Impressions, published in 1843, is a three volume set of cyanotypes or "sun-prints," which, like photograms, are made without a camera. So technically not a photobook as we know it, it is nonetheless the first bound book to be illustrated exclusively with photographic relief images—made by placing various seaweed on light-sensitive paper before exposing it to the sun. The process was discovered by a family friend, Sir John Herschel, a year prior. Atkins paved the way for use of photographic images in science publishing, ultimately becoming known as the world's first female photographic artist, and now, subject of a Google Doodle.