Smallest organisms 4.4 cm (1.7 in). The smallest member of the order Carnivora is the least weasel ("Mustela nivalis"), with an average body length of 114–260 mm (4.5-10.2 in). It weighs between 29.5 – 250 grams with females being lighter. The smallest marsupial is the Long-tailed planigale from Australia. It has a body length of (including tail) and weigh on average. The Pilbara ningaui is considered to be of similar size and weight. The smallest member of the primate order is Madame Berthe's mouse lemur ("Microcebus berthae"), found in Madagascar, with an average body length of 92 mm (3.6 in). The smallest
Mid-Continent Railway Museum Mid-Continent Railway Museum The Mid-Continent Railway Museum is a railroad museum in North Freedom, Wisconsin, United States. The museum consists of static displays as well as a 7-mile round trip ride aboard preserved railroad cars. Mid-Continent Railway Museum's collection emphasizes the preservation of railroad items operated in the upper Midwest from the period of 1880-1916, what the organization refers to as the "Golden Age of Railroading". During that time, railroads saw an unprecedented rate of expansion, growing in size in the United States from 93,000 to 254,037 miles of track. Three steam locomotives are currently under restoration to federal guidelines.