A mysterious thick fog has swept across the US with multiple communities reporting a "burning chemical-like smell," akin to a similar event last year when 70 million people were engulfed in dense fog.

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If you want to experience China, you can't avoid Chongqing. This megacity is growing at a blistering place. But beware, it is not a place for anyone with a fear of heights, or a sensitive stomach.

You’re not alone. Brain fog—that frustrating state of mental cloudiness and confusion—can be influenced by many factors, but one of the biggest culprits is what you eat and drink.

The cherry blossoms in Qianli Yingyuan, on the western outskirts of Zhongxian county in Chongqing, recently burst into vibrant colors, thanks to the rise of spring temperatures. [Photo by Yu Hong ...