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.
Water is the most popular beverage in the world, and for good reason. Water helps all your bodily functions work more efficiently, from thinking to fighting disease to maintaining a healthful weight, according to a web page on the Lake Forest College site, and should be consumed before you drink anything else.