- Heart | Members, Albums, Songs, Facts | Britannica
Heart, American rock band formed in 1974 and led by sisters Ann Wilson and Nancy Wilson Heart sold millions of records from the mid- to late 1970s, bolstered by the singles “Magic Man” (1976) and “Barracuda” (1977), and staged a comeback in the mid-1980s with a pop-oriented sound and hits such as
- California | Flag, Facts, Maps, Capital, Cities, Destinations . . .
Geographical and historical treatment of California, including maps and a survey of its people, economy, and government The fluid nature of the state’s social, economic, and political life—shaped so much by immigrants—has for centuries made California a laboratory for testing new modes of living
- Alcatraz Island | Facts, Escape, Native Americans, Map, History . . .
Alcatraz Island, also known as ‘The Rock,’ a rocky island in San Francisco Bay, off the coast of California, in the United States From 1934 to 1963, a facility on the island served as a federal prison for some of the most dangerous civilian prisoners Learn more about the history of Alcatraz Island here
- Sierra Nevada | U. S. Mountain Range, Physical Features History . . .
Sierra Nevada, major mountain range of western North America, running along the eastern edge of the U S state of California Its great mass lies between the large Central Valley depression to the west and the Basin and Range Province to the east Extending more than 250 miles (400 kilometres)
- San Andreas Fault | California, Earthquakes, Plate Tectonics | Britannica
San Andreas Fault, major fracture of the Earth’s crust in extreme western North America The fault trends northwestward for more than 800 miles (1,300 km) from the northern end of the Gulf of California through western California, U S , passing seaward into the Pacific Ocean in the vicinity of San
- Pony Express | U. S. Mail Delivery, History, Map | Britannica
The Pony Express was a system of U S mail delivery that operated from April 3, 1860, until October 1861 It consisted of continuous horse-and-rider relays between St Joseph, Missouri, and Sacramento, California, with steamers covering the final leg from Sacramento to San Francisco
- Jonas Salk | Biography, Facts, Polio Vaccine | Britannica
Jonas Salk, American physician and medical researcher who developed the first safe and effective vaccine for polio Salk’s vaccine was released for use in the United States in 1955 In the years that followed, polio incidence in the United States fell from 18 to less than 2 cases per 100,000 people
- Rock | Definition, Characteristics, Formation, Cycle, Classification . . .
Rock, in geology, naturally occurring and coherent aggregate of one or more minerals Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes The three major classes of rock are igneous, sedimentary, and metamorphic rock
|