If you've been to a health food store recently, you've probably noticed jojoba (pronounced ho-ho-ba) oil lining the shelves. And while the lipid has only recently become popular in the U.S., it's been used to treat dry skin for centuries, especially in Mexico [Source: Zeichner].
Forbes released its 2015 list of the worldâs richest people, with Microsoftâs co-founder Bill Gates reclaiming the top spot from Mexicoâs telecommunications mogul Carlos Slim Helu. According to Forbes, a record net worth of $29.2 billion was needed to make the top 20.
Citizenship: United States. Bill Gates is once again the richest person on the planet, a title he's held for 16 out of the last 21 years. He recaptured the top spot in March 2014 after a four-year run by Mexico's Carlos Slim Helu as No. 1.