Grant’s parents named him Hiram but called him by his middle name, Ulysses, or “Lyss” for short. When he entered West Point in 1839, his name was mistakenly changed to U. Simpson. He then became known as U.S. Grant, rather than H.U. Grant, which stood for the initials for his given name, Hiram Ulysses.
During sleep, your brain’s electrical activity goes through a five-phase cycle. A short afternoon catnap of 20 minutes yields mostly Stage 2 sleep, which enhances alertness and concentration, elevates mood, and sharpens motor skills. To boost alertness on waking, you can drink a cup of coffee before you nap.