<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><font class="Apple-style-span" face="arial, helvetica, sans-serif">http://www.nature.com/news/super-dense-celestial-bodies-could-be-a-new-kind-of-planet-1.12599</font></div></div></body></html>