History & Culture. In April 1917, the United States entered World War I on the side of the Allies. Previously angered by the sinking of Lusitania, President Woodrow Wilson led the nation to war after learning of the Zimmermann Telegram and Germany's resumption of unrestricted submarine warfare.
WATER AND HUMANS. * The human body is more than 60 percent water. Blood is 92 percent water, the brain and muscles are 75 percent water, and bones are about 22 percent water. * A human can survive for a month or more without eating food, but only a week or so without drinking water.
As people get older, they tend to have a lower percentage of body water. For example, a baby has about 75 percent body water, which drops to about 65 percent by 1 year of age. While adult women have about 55 percent body water, elderly people typically have only about 50 percent body water. This is partially because as people age, they lose muscle mass.