A team at the University of Pennsylvania School of Medicine studied certain brain cells which are involved in keeping the brain alert.

After several days of sleep patterns similar to those followed by night workers - three days of night shifts with only four to five hours sleep in 24 hours - the mice lost 25% of the brain cells, in part of the brain stem.

The researchers say this is the first evidence that sleep loss can lead to a loss of brain cells.

That explains why all parents turn into stuttering fools after the baby's first two years.

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but srsly guise, We kill our brain cells in so many different ways that this might be the most innocuous of them all. Fuck, now I need to get high. Remember, Tyra Banks says the most important item in your makeup bag is a good night's sleep.

[BBC health]