Jeff Rotman / Man and woman with Cannabis plant in organic Marijuana farm, Pueblo, Colorado, USA, June 2015. . Marijuana has legalized in the state of Colorado, and this farm produces Marijuana for medical and reta...

Jeff Rotman / Person holding large Cannabis bud, in organic Marijuana farm, Pueblo, Colorado, USA, June 2015. . Marijuana has legalized in the state of Colorado, and this farm produces Marijuana for medical and ret...

Cyril Ruoso / Woman with baby collecting Madagascar periwinkle (Catharanthus roseus) flowers and leaves, used in herbal medicine, and containing molecules which are used in the treatment of leukemia cancer. Berenty...

Jeff Rotman / Irula Snake Tribe member holding vials of snake anti-venom for Viper, Krait and Cobra bites. Southern India.

Anup Shah / Alpha male Chimpanzee 'Frodo', 26-years-old, feeding on leaves {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002. Chimps have learnt that certain leaves can be used to tre...

Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species. On riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.

Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.

Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.

Heather Angel / Caterpillar fungus (Ophiocordyceps sinensis), a rare traditional Chinese medicine sold to nourish yin and yang, for anti-aging and as natural viagra substitute- Dong Chong Xia Cho. Yunnan, China.

Inaki Relanzon / Traditional Chinese medicines made from Moon bear (Ursus thibetanus) bile which is used to various ailments, such as fever, gall stones, liver problems, heart disease and eye irritations, China, Septe...

Juan Carlos Munoz / Shop selling animal body parts for Chinese medicine, Kunming, Yunnan, China, April 2016.

Paul D Stewart / 1491 Woodblock illustration of from Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health'. Shows an apothecary removing a toad stone bezoar from a large toad's 'third eye'. Toad s...