The vending machine experiment (or why you don't live in a tree)

Science unscripted - A podcast by DW.COM | Deutsche Welle

In a dream you see a vending machine. Instead of coins or cash, it has a square-shaped hole. That's it. No instructions. No one who walks past can explain it. At some point you shake it violently (still nothing) and see your own hands. They're furry.

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