With a sweeping 12-month observation of the entire sky, scientists using NASA's Wilkinson Microwave Anisotropy Probe (WMAP - Pronounced 'W-MAP') created the most detailed portrait ever of the infant Universe, revealing its age and other key characteristics. This new portrait - capturing the afterglow of the Big Bang, called the cosomic microwave background (CMB) - estimates the age of the Universe at 13.7 billion years old.