A Checklist by xkcd to Help People Tell If It Is a Bird, a Plane, or Actually Superman Ip in the Sky
by Justin Page from Laughing Squid on (#2B31J)
xkcd creator Randall Munroe created an amusing comic, titled "Bird/Plane/Superman," that features a checklist to help pedestrians figure out if it is a bird, a plane, or actually Superman up in the sky.
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