According to Randall Munroe of What If?, most 6-, 8-, or even 12-pound bowling balls will float in seawater.

The last letter added to the alphabet was J. It wasn’t added until the 19th century. Before that, everyone thought of I and J as the same letter. That’s why Washington, D.C., has no J Street.

According to Rebecca M. Herzi, author of Plucked: A History of Hair Removal, American women who shave spend more than $10,000 and nearly two entire months of their lives managing unwanted hair. The woman who waxes once or twice a month will spend more than $23,000 over the course of her lifetime.

Julie Nimoy Schwartz and her dad, the late Leonard Nimoy, appeared together in a 1991 TV ­commercial for Oldsmobile.

America’s prison population seems to be declining, according to the N.Y. Times, from an all-time high of 1.62 million in 2009 to about 1.57 million in 2012. But even if the downward trend continues, it could take almost 90 years for the prison population to get down to where it was in 1980.

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