February 2014, page 58—In the second paragraph, the two occurrences of sin α should be cos α.

April 2014, page 30—The equation-of-state parameter given in the first paragraph “Windows onto dark energy” should be wDE = −1.027 ± 0.055.

May 2014, page 17—The formula for thallium trifluoroacetate should be Tl(CF3COO)3.