Why people clean the bones of their dead relatives every year in this Mexican village

In the days leading up to Día de los Muertos, or Day of the Dead, families in Pomuch, Mexico, take their deceased relatives' skeletons out of their tombs for their annual cleaning. The ritual is said to originate with the Mayans, and today, only Catholics here practice it. The pandemic has kept people away from the cemetery for the past two years, and younger generations are unlikely to carry on the tradition for much longer.