Paleontological and Paleobotanical Museum (Nostimo) teeth of a shark that was 20–25 m long, and a Late Pliocene (3.5 million years old) tooth of an "Anancus arvenensis", a mastodon, an ancient relative of the elephant, which has been recognised here for the first time in the wider area of Western Macedonia. The mastodon which lived in this area was about the same size as a modern elephant, but with longer tusks. Also displayed are some Neolithic tools (from the 4th millennium BC): a fishing weight, and a blade for harvesting crops. Paleontological and Paleobotanical Museum (Nostimo) The Paleontological and Paleobotanical Museum () at Nostimo is
Mastodon (steam locomotive) Mastodon (steam locomotive) Mastodon was the unofficial name of the Central Pacific Railroad's number 229, the world's first successful 4-8-0 steam locomotive. The engine was designed and built by the road's master mechanic, Andrew Jackson "A.J" Stevens at Sacramento Locomotive Works in 1882. The locomotive had two highly unusual features: the firebox shape and the steam distribution. The only other locomotives to use such a valve gear were the 20 copies of "Mastodon" (see below) and CPR #237 "El Gobernador." All other steam locomotives with slide valves had just a single valve in the center. After being readied for its