Four pregnant women sit in lotus position. Thomas Northcut/Getty Images hide caption

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Say Yes To Down Dog: More Yoga Poses Are Safe During Pregnancy
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Prime Minister Narendra Modi performs yoga along with thousands of Indians on Rajpath, the mall of central New Delhi, for International Yoga Day. Saurabh Das/AP hide caption

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35,000 Bend It With Modi As India Launches World Yoga Day
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Yogis in Bangalore get ready for the International Yoga Day on June 21. MANJUNATH KIRAN/AFP/Getty Images hide caption

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Who Knew Yoga Could Be So Stressful!
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Yoga practitioners celebrate the solstice in New York's Times Square in 2011. Richard Drew/AP hide caption

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Those Yoga Poses May Not Be Ancient After All, And Maybe That's OK
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The SmartMat is a responsive yoga mat that seeks to improve one's yoga practice. Microsensors embedded in the mat record and provide adjustments to the user in real time. Courtesy of SmartMat hide caption

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If it weren't for B.K.S. Iyengar, yoga wouldn't be quite as popular in the West. This photo of the yogi, who died this week at 95, was taken in Karnataka, India on May 3, 2005. Hemant patil/Corbis hide caption

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People practice yoga at a fundraiser for a breast cancer foundation in Hong Kong. Ed Jones/Getty Images hide caption

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