News 15 ‘Then and Now’ Photos That Show Dramatic Changes on Earth C.C. 0 © NASA Alaska’s Columbia Glacier, 2014 Alaska’s Columbia Glacier retreating between July 28, 1986, and July 2, 2014. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 <12 3 45 ... 31>