Fern fern ("Onoclea sensibilis"). Giant water fern ("Salvinia molesta") is one of the world's worst aquatic weeds. The important fossil fuel coal consists of the remains of primitive plants, including ferns. Ferns have been studied and found to be useful in the removal of heavy metals, especially arsenic, from the soil. Other ferns with some economic significance include: The study of ferns and other pteridophytes is called pteridology. A pteridologist is a specialist in the study of pteridophytes in a broader sense that includes the more distantly related lycophytes. Pteridomania is a term for the Victorian era craze of fern collecting
Kingdom of Plants 3D "Galapagos 3D", broadcast in 2013. A companion iPad app to the series was released on 23 May 2012, using video and imagery from the series to provide a virtual tour of the Royal Botanic Gardens, Kew. Of the app, Attenborough commented "You can swipe your finger across the tablet to make a plant flower and, not only that, put it back again; it’s quite fun." Kingdom of Plants 3D Kingdom of Plants 3D is a natural history documentary series written and presented by David Attenborough, which explores the world of plants. It was filmed over the course of a year