Scientists create smarter mice with 'half-human' brains

Mice injected with human brain cells grow to have'half human brains' that make them smarter than other rodents, scientists have found. Researchers claim that giving mouse pups a type of immature human brain cell, known as glial cells, caused their brains to grow differently so they became more human-like. These human glial cells, which are the support cells of the brain providing it with structure and nutrients, multiplied and grew to replace a similar type of cell in the brains of the mice. Mice injected with human brain cells grow to have'half human brains' that make them smarter than other rodents, scientists have found. While the mice still had their own neurons - the cells that transmit and store information in the brain - the support cells were almost entirely human, according to the researchers.