In addition to the upcoming solar eclipse stamp being issued by the U.S. Postal Service (C&EN, June 5, page 40), several other countries have released stamps printed with thermochromic ink. Of particular interest to readers of C&EN may be the buckminsterfullerene stamp issued in Great Britain in 2001 to honor the centennial of the Nobel Prizes. Gentle warming of the stamp’s surface reveals the presence of a black sphere (presumably a noble gas or metal atom) inside the molecule of C60: an endohedral fullerene!
June 19, page 8: A production error led to a page from the Jan. 9 issue printing in place of the correct page of science concentrates from the June 19 issue. Read the stories missing from the June 19 print edition online at cenm.ag/solarcolors and cenm.ag/fdaopioid.