The Spiralist

By Dr Kevin Dann

Why do helical seashells resemble spiralling galaxies and the human heart? Kevin Dann leads us into the gyre of James Bell Pettigrew’s Design in Nature (1908), a provocative and forgotten exploration of the world’s archetypal whorl. more

“Spontaneous Revolutions”: Darwin’s Diagrams of Plant Movement

By Natalie Lawrence

After weeks of watching young tendrils slowly corkscrew their way toward the sun, Charles Darwin set about inventing a system for making botanic motion visible to the naked eye. Natalie Lawrence delves into a lesser-known chapter of the naturalist’s research, discovering revelations about the vegetal world that remain neglected to this day. more