This mysterious cactus only blooms once a year and people flock to

Tohono Chul, in Tucson, is home to the largest known private collection of night-blooming cereus, aka Queen of the Night, in the world. It blooms just for one night each
Watch as Arizona's night-blooming cereus unfolds in this timelapse video from Tohono Chul.
Every 221 years, two major cicada broods, XIII and XIX, emerge together. The last time this happened, Thomas Jefferson was president of the United States

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