The universe is growing colder and darker. These charts show the
relative constituents of the universe today (top), and for when
the universe was 380,000 years old, 13.7 billion years ago
(bottom). Neutrinos used to be a larger fraction of the energy
of the universe than they are now. Below: This image shows WMAP
cosmic microwave fluctuations over the full sky with five years
of data. Colors represent the tiny temperature fluctuations of
the remnant glow from the infant universe: red regions are
warmer and blue are cooler. Images: WMAP Science Team Satellite
reveals treasure trove of data, including evidence for early
universe neutrinos Posted March 7, 2008; 05:21 p.m. A NASA
satellite built in partnership with Princeton scientists has
uncovered evidence that a sea of neutrinos -- almost weightless
elementary particles that zip around at nearly the speed of
light -- permeates the universe. The discovery, announced March
7 by NASA, is part of a treasure trove of findings gleaned from
five years of data collect