A trail, also known as a path or track, is an unpaved lane or a small paved road not intended for usage by motorized vehicles, usually passing through...

apoptosis-inducing ligand (TRAIL), is a protein functioning as a ligand that induces the process of cell death called apoptosis. TRAIL is a cytokine that is...

The Appalachian Trail, also called the A.T., is a hiking trail in the Eastern United States, extending almost 2,200 miles (3,540 km) between Springer Mountain...

types of trails: the national scenic trails, national historic trails, national recreation trails, and connecting or side trails. The national trails provide...

The Trail of Tears was the forced displacement of approximately 60,000 people of the "Five Civilized Tribes" between 1830 and 1850, and the additional...

Oregon Trail in Wiktionary, the free dictionary. The Oregon Trail was a historic migration route across the western United States. Oregon Trail may also...

The Oregon Trail was a 2,170-mile (3,490 km) east–west, large-wheeled wagon route and emigrant trail in the United States that connected the Missouri...

Broken Trail is a 2006 Western television miniseries directed by Walter Hill and starring Robert Duvall and Thomas Haden Church. Written by Alan Geoffrion...

The California Trail was an emigrant trail of about 1,600 mi (2,600 km) across the western half of the North American continent from Missouri River towns...

Contrails (/ˈkɒntreɪlz/; short for "condensation trails") or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air...