This series of maps by @maxcroser is one of my all-time favorites. It shows the decline in child mortality from 1800 to 2015. It's stuff like this that stops me from losing faith in humanity. pic.twitter.com/CVhABorwZD
Karl Schwarzschild, who died OTD 1916, beat Einstein to the punch by finding the first exact solution to the equations of General Relativity–a solution that, among much else, revealed the possibility of black holes, now confirmed. pic.twitter.com/WCoxcteFpw
