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An illustration of a fossil containing Chirotherium tracks. Chirotherium (also known as Cheirotherium) or 'hand-beast', is the name of a creature which may be known only from fossil imprints of its tracks (trace fossils). These look, by coincidence, remarkably like the hand of an ape/human or bear, with the outermost toe having evolved to extend out to the side like a thumb, although probably only providing a firmer grip in mud. Its tracks were first found in 1834, in red sandstone in Thuringia, Germany, dating from 240 million years ago (mya). This creature was probably an archosaur, related to the ancestors of the dinosaurs.

Chirotherium Tracks

An illustration of a fossil containing Chirotherium tracks. Chirotherium (also known as Cheirotherium)…

Tracks of Chirotherium or "hand-beast" in Buntsandstein found in Hessbeg, Germany.

Chirotherium Tracks

Tracks of Chirotherium or "hand-beast" in Buntsandstein found in Hessbeg, Germany.

A series of footprints in the mud.

Footprints

A series of footprints in the mud.

"In railway engineering, the running together of parallel tracks into the space occupied by one, by crossing the two inner rails so as to bring each side by side with the opposite outer rail." -Whitney, 1911

Gauntlet Track

"In railway engineering, the running together of parallel tracks into the space occupied by one, by…

"Industrial Railway. a, cast-iron plates bedded in concrete for boiler-room floor; b, section of boiler; c, cast-iron track; d, charging-car with outside-flange wheels." -Whitney, 1911

Industrial Railway

"Industrial Railway. a, cast-iron plates bedded in concrete for boiler-room floor; b, section of boiler;…

"An implement for clearing away snow from roads, railways, etc. a, body of plow; b, caboose for implements and workmen; c, movable wings for widening the cuttings; c1, doors which give access to leading truck for oiling, etc.; d, cupola; e, headlight; f, iron plates, scrapers, or shoes which remove snow from the outer margins of the track; f, adjustable aprons which clean out the snow from between the tracks flush with the wheel flanges; g, intermediate apron; h, draw-bar for hauling the plow when not in use; i, adjustable scraper for removing hard-packed snow or ice from the inner side of the rails." —Whitney, 1889

Wing Snow Plow

"An implement for clearing away snow from roads, railways, etc. a, body of plow; b, caboose for implements…

A man carrying firewood and dog walking leaving footprints in the snow. A cottage is seen in the distance. Bare winter trees are along the way.

Walking Through Snow

A man carrying firewood and dog walking leaving footprints in the snow. A cottage is seen in the distance.…

A train is a connected series of vehicles that move along a track (permanent way) to transport freight or passengers from one place to another. The track usually consists of two rails.

Train

A train is a connected series of vehicles that move along a track (permanent way) to transport freight…

This sign indicates that a train station is located nearby.

Train Station, Black and White

This sign indicates that a train station is located nearby.

This sign indicates that a train station is located nearby.

Train Station, Color

This sign indicates that a train station is located nearby.

This sign indicates that a train station is located nearby.

Train Station, Outline

This sign indicates that a train station is located nearby.

This sign indicates that a train station is located nearby.

Train Station, Silhouette

This sign indicates that a train station is located nearby.