For what reason did south sudan split from sudan in 2011

South Sudan gained independence from Sudan in July 2011 as the outcome of a 2005 peace deal that ended Africa's longest-running civil war. An overwhelming majority of South Sudanese voted in a January 2011 referendum to secede and become Africa's first new country since Eritrea split from Ethiopia in 1993.

Explanation:

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.