White piedra is a superficial fungal infection of the hair. Several species of fungus that live in soil or dirty water can cause it. Piedra is the Spanish word for stone. White piedra appears as ...

Charlie Hall is Polygon’s tabletop editor. In 12-plus years as a journalist & photographer, he has covered simulation, strategy, and spacefaring games, as well as public policy. Magic: The ...

But have you ever considered using a golf cart? Yo-Go is the unlikely start-up asking that very question - as it tries to challenge the capital's love affair with cars. It wants to steer people ...