In the 1960s and '70s, a series of questionable experiments claimed to prove that plants could behave like humans, that they had feelings, responded to music and could even take a polygraph test.

Rachel Feltman: Can plants “think”? Do they “make plans”? Do they “talk” to one another? Believe it or not, these are questions that scientists are asking quite seriously—and it’s starting to look ...

Climate journalist Zoë Schlanger says research suggests that plants are indeed "intelligent" in complex ways that challenge our understanding of... Plants can communicate and respond to touch. Does ...