Panek, Richard. <br/><br/>
The 4 percent universe :  dark matter, dark energy, and the race to discover the rest of reality / 
Title on dust jacket :  4 % universe :  dark matter, dark energy, and the race to discover the rest of reality.  Four percent universe :  dark matter, dark energy, and the race to discover the rest of reality. 
Richard Panek. 
 - Boston, MA :  Houghton Mifflin Harcourt,  2011. 
 - xvi, 297 p. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780618982448 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmology.<br/>Physics.<br/>Astrophysics.<br/>Dark matter (Astronomy)<br/>Dark energy (Astronomy)
<br/><br/><label>Dewey Class. No.: </label>523.1  / PAN 2011