Crown of Thorns is a succulent tropical shrub that's charmed gardeners for centuries. Native to Madagascar, this hardy plant is celebrated for its resilience and is said to bring both good luck ...

Outside, the plant thrives in rock gardens ... Like other Euphorbia species, the crown of thorns contains a white sap that can irritate the skin and eyes upon contact, even causing temporary ...

He then goes on to specify how biologists believe crown-of-thorns starfish were able to replicate this trait. He says it was born from a characteristic of a completely different type of starfish.