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rock carvings and paintings

(Encyclopedia)rock carvings and paintings, designs inscribed on rock surfaces and huge stone monuments in many parts of the world by prehistoric or preindustrial peoples. They have been found on every continent and...

perfluoroalkyl and polyfluoroalkyl substances

(Encyclopedia)perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS, which resist w...

monsters and imaginary beasts

(Encyclopedia)monsters and imaginary beasts. The mythologies and legends of ancient and modern cultures teem with an enormous variety of monsters and imaginary beasts. A great number of these are composites of diff...

São Tomé and Principe

(Encyclopedia)CE5 São Tomé and Principe prēnˈsēpə [key], officially Democratic Republic of São Tomé and Principe, republic (2015 est. pop. 196,000), 372 sq mi (964 sq km), W Africa, in the Gulf of Guinea...

Long, Stephen Harriman

(Encyclopedia)Long, Stephen Harriman, 1784–1864, American explorer, b. Hopkinton, N.H. As an army engineer, Long was sent on several exploring and surveying expeditions. The first in 1817 was to the region of the...

Grinnell, George Bird

(Encyclopedia)Grinnell, George Bird grənĕlˈ [key], 1849–1938, American naturalist and student of Native American life, b. Brooklyn, N.Y., grad. Yale (B.A., 1870; Ph.D., 1880). He accompanied Custer's Black Hil...

physical education and training

(Encyclopedia)physical education and training, organized instruction in motor activities that contribute to the physical growth, health, and body image of the individual. The historical roots of physical education ...

Wallis and Futuna Islands

(Encyclopedia)Wallis and Futuna Islands wŏlˈĭs, fo͞oto͞oˈnä [key], officially Territory of the Wallis and Futuna Islands, French overseas territory (2015 est. pop. 12,000), 106 sq mi (274 sq km), S Pacific, ...

Persian art and architecture

(Encyclopedia)Persian art and architecture, works of art and structures produced in the region of Asia traditionally known as Persia and now called Iran. Bounded by fierce mountains and deserts, the high plateau of...

Flemish art and architecture

(Encyclopedia)Flemish art and architecture, works of art and structures produced in the region of Europe known for centuries as Flanders. Netherlandish art is another term sometimes used for these works. Art produc...