 Skepticism increased with the revelation of documentation demonstrating misconduct and past criminal conduct.In 2012, scientists reported evidence supporting a modified version of the Younger Dryas impact hypothesis—involving a much smaller, non-cometary impactor—was found in lake bed cores dating to 12,900 YBP from Lake Cuitzeo in Guanajuato, Mexico.It included nanodiamonds (including the hexagonal form called lonsdaleite), carbon spherules, and magnetic spherules.