Retrieves, but does not remove, the head of the queue represented by this deque (in other words, the first element of this deque). This method differs from peek only in that it throws an exception if this deque is empty.
A Lack Of Water Is A Lack Of Brain Power. Led by Dr. Caroline Edmonds, researchers in the UK recently conducted a study showing that even mild dehydration has a negative effect on the brain's performance. Drinking water, the researchers found, can improve the brain's ability to complete tasks that require a rapid response.
Dehydration (Severe) â Due to the fact that the brain is 75% water, it is important to make sure that it stays hydrated. Although failing to drink 8 glasses of water a day isnât going to do any sort of damage, if you go without any fluids for a 24 hour period, you will likely end up killing some brain cells.