"But if optical observations of the oldest stars and galaxies is analogous to "baby pictures" of the universe, then observing the cosmic background radiation is like looking at an ultrasound. However, the results of BICEP2 pull information out of that background radiation that is probably more analogous to a pregnancy test, revealing information about the very first infinitesimally tiny moments of creation when the universe was far less than one-trillionth of a second old."