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Neil deGrasse Tyson @neiltyson
Just occurred to me: The famous Bat-Signal that summons Batman’s crime-fighting skills works only on cloudy nights -- and never in the daytime. Seems to me, a bat emoji sent to Bruce Wayne’s smart phone or even an old fashioned beeper would improve on this. https://t.co/APfyigCnwQ — PolitiTweet.org