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Researchers in China grafted the heads of smaller rats onto the necks of larger rats.

The scientists successfully avoided any brain-damaging blood loss, accomplishing the goal of the study published in 'CNS Neuroscience and Therapeutics.'

Blood vessels of the donor rat's head were attached to a third rat's blood vessels which kept blood flowing continuously to the donor rat's brain.

No damaging was detected on EEGs monitoring the donor rat's brain activity throughout the transplanting procedure.