Elon Musk, billionaire founder of Tesla Motors and SpaceX, and his wife Talulah Riley are making another attempt to end their second marriage. The pair married in 2010 and divorced two years later, only to remarry 18 months after that. Musk then filed for divorce on New Year's Eve in 2014 but withdrew the petition seven months later. On Monday, Riley filed for divorce in Los Angeles Superior Court, according to NBC News.