The Maya temple Tikal in Guatemala is about one day's walk from Xultun, where researchers discovered mathematical formula scribbled on the walls.Credit: Kryssia Campos/GettyA mathematical formula inscribed on a wall at the Maya site of Xultun in Guatemala has revealed the name of an important Maya mathematician-astronomer for the first time. Researchers suggest Sak Tahn Waax, or ‘White-Chested Fox’, was a scholar comparable with mathematical giants of the past.In a study published 14 July in the...