A nearly 40-million-year-old skeleton belonging to what is popularly known as a sabre-toothed tiger is going under the hammer in Geneva a year after its discovery on a US ranch. The skeleton, some 120 centimetres (nearly four feet) long, is expected to fetch between 60,000 and 80,000 Swiss francs ($66,560 to $88,750; 55,300 to 73,750 euros) at auction in the Swiss city.