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Sir Garlon writes:

"Researchers in Japan have developed a chainsaw-wielding robot that climbs trees and prunes off limbs. Such pruning is currently done by humans, who can't always use a cherry picker and sometimes have to climb the tree and operate the chainsaw one-handed. That is, not surprisingly, rather dangerous. The robot is still experimental, and it's remotely operated, not fully autonomous. But it's an impressive gadget none the less. Robots with chainsaws, what could possibly go wrong? Linked article includes video."