On this day: June 21

Published On: Jun 20 2013 02:10:40 AM CDT   Updated On: Jun 21 2013 01:00:00 AM CDT

The first Ferris Wheel opens in Chicago, Lou Gehrig retires, Johnny Cash releases his first single, the WNBA begins play, and a TV icon and a blues legend both die, all on this day.

OTD June 21 - Nix and Hydra
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NASA/ESA

2006: Pluto's newly discovered moons are officially named Nix and Hydra.

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