RT @IYL2015: #OnThisDay in 1919, solar eclipse observations proved that Einstein was right light2015blog.org/2015/03/19/wha… #IYL2015 http://t.co/mITV…
RT @IYL2015: #OnThisDay in 1919, solar eclipse observations proved that Einstein was right light2015blog.org/2015/03/19/wha… #IYL2015 http://t.co/mITV…