Changes

== Known facts ==

== Known facts ==

Pluto has an elliptical orbit.  When it was considered to be a planet, it was usually the furthest from the sun, but there are times due to its odd orbit when it is closer than [[Neptune]].<ref>http://science.jrank.org/pages/5352/Pluto.html</ref>  

Pluto has an elliptical orbit.  It is usually further from the sun than any of the eight planets, but there are times due to its odd orbit when it is closer than [[Neptune]].<ref>http://science.jrank.org/pages/5352/Pluto.html</ref>

== Problems for evolutionary theory ==

== Problems for evolutionary theory ==