TOO CUTE: Two sloths stole a gravity-defying kiss at the Smithsonian National Zoo. The zoo shared the clip of its sloths, Athena and Vlad, smooching in honor of Valentine's Day on Monday. » Sign up for our newsletter KnowThis to get the biggest stories of the day delivered straight to your inbox: https://go.nowth.is/knowthis_youtube » Subscribe to NowThis: http://go.nowth.is/News_Subscribe
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