
list of presidents of the United States - Encyclopedia Britannica
As the head of the government of the United States, the president is arguably the most powerful government official in the world. The president is elected to a four-year term via an electoral …
Metamorphic rock | Definition, Formation, & Facts | Britannica
May 7, 2025 · Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical …
Igneous rock | Characteristics, Examples, Formation, & Types
May 16, 2025 · Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or …
Jack White | Biography, Music, & Facts | Britannica
4 days ago · Jack White (born July 9, 1975, Detroit, Michigan, U.S.) is an American guitarist, singer, and songwriter who first gained fame with the White Stripes and later performed in …
Rock, Massachusetts, Colony, Map, History, & Facts - Britannica
Jun 11, 2025 · Plymouth, town (township), Plymouth county, southeastern Massachusetts, U.S.It lies on Plymouth Bay, 37 miles (60 km) southeast of Boston.It was the site of the first …
Linda Ronstadt | Biography, Albums, Songs, & Facts | Britannica
Apr 22, 2025 · Linda Ronstadt (born July 15, 1946, Tucson, Arizona, U.S.) is an American singer, with a pure, expressive soprano voice and eclectic artistic tastes, whose performances called …
Rocky Mountains | Location, Map, History, & Facts | Britannica
3 days ago · Rocky Mountains, mountain range forming the cordilleran backbone of the great upland system that dominates the western North American continent. Generally, the ranges …
Standing Rock protests | Summary, Violence, & Outcome | Britannica
The Standing Rock protests were a campaign undertaken in North Dakota in 2016 and 2017 to halt the construction of the Dakota Access pipeline. Early resistance to the pipeline was …
Plymouth Rock | Geology, Legend, History, & Facts | Britannica
Plymouth Rock, granite slab upon which, according to tradition, the Pilgrim Fathers stepped first after disembarking from the Mayflower on December 26, 1620, at what became the colony of …
Rock - 1960s, British Invasion, Psychedelic | Britannica
Jun 14, 2025 · Rock - 1960s, British Invasion, Psychedelic: Whatever the commercial forces at play (and despite the continuing industry belief that this was pop music as transitory novelty), it …