Just After It All Began, the Universe Sent Us a Text Message. We Just Decoded It.

"We all heard the cosmos-stretching news this week. On Monday, a team of researchers working with a special telescope at the South Pole confirmed that they had observed evidence of "inflation," the sudden and rapid expansion of the universe that occurred in an unimaginably small slice of time just after the Big Bang, the beginning of space and time some 13.8 billion years ago. The researchers achieved this feat by examining what is known as the cosmic microwave background or CMB, which has been called the "residual heat of creation." It is a light glow that suffuses the universe and that is nearly as old as the Big Bang itself—its leftover radiation and, you might say, its signature..."

http://www.motherjones.com/environment/2014/03/inquiring-minds-phil-plait-big-bang-inflation-explained