Cacti are among the most diverse plants, from the giant saguaro cactus that can grow up to 18 meters in height, all the way down to the tiny button cactus which is a few centimeters tall. A new study ...

Peyote is one of the most unusual plants in the world, a tiny desert cactus that protects itself using powerful psychoactive chemicals instead of sharp spines . Native to Mexico and the American ...