From the hippy times of the 1960's, a new thinking about plant consciousness emerged - perhaps the humble onion could actually think for itself? It sounds bizarre, but even the CIA was interested in the spying abilities of the humble houseplant. This week we look at how this thinking gave us cybernetics, several horror movies and a modern scientist determined to prove that plants really can think for themselves. We also revisit the Findhorn garden, the god Pan, and the potato king.

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