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Rock music

Rock music is a loosely defined genre of popular music that entered the mainstream in the mid 1950s. It has its roots in 1940s and 1950s rhythm and blues, country music and also drew on folk music, jazz, and classical music.

The sound of rock often revolves around the electric guitar or acoustic guitar, and it uses a strong back beat laid down by a rhythm section of electric bass guitar, drums, and keyboard instruments such as organ, piano, or, since the 1970s, synthesizers. Along with the guitar or keyboards, saxophone and blues-style harmonica are sometimes used as soloing instruments. In its "purest form", it "has three chords, a strong, insistent back beat, and a catchy melody."

In the late 1960s and early 1970s, rock music developed different subgenres. When it was blended with folk music it created folk rock, with blues to create blues-rock and with jazz, to create jazz-rock fusion. In the 1970s, rock incorporated influences from soul, funk, and latin music. Also in the 1970s, rock developed a number of subgenres, such as soft rock, glam rock, heavy metal, hard rock, progressive rock, and punk rock. Rock subgenres that emerged in the 1980s included New Wave, hardcore punk and alternative rock. In the 1990s, rock subgenres included grunge, Britpop, indie rock, and nu metal.

A group of musicians specializing in rock music is called a rock band or rock group. Many rock groups consist of an electric guitarist, lead singer, bass guitarist, and a drummer, forming a quartet. Some groups omit one or more of these roles and/or utilize a lead singer who plays an instrument while singing, sometimes forming a trio or duo; others include additional musicians such as one or two rhythm guitarists and/or a keyboardist. More rarely, groups also utilize stringed instruments such as violins or cellos, woodwind instruments such as saxophones, and brass instruments such as trumpets or trombones.

For more information about Rock music, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.

Soviet find of water on the Moon in the 1970s ignored by the West

(Phys.org) -- In August 1976 Luna 24 landed on the moon and returned to Earth with samples of rocks, which were found to contain water, but this finding was ignored by scientists in the West.

Space & Earth / Space Exploration

created Jun 01, 2012 | popularity 4.7 / 5 (36) | comments 35 | with audio podcast report

Zircon crystals reveal onset of plate tectonics

(Phys.org) -- We're familiar with the theory that the Earth's crust is composed of tectonic plates that move, sometimes dramatically to create earthquakes and tsunamis - but until recently, nobody knew how ...

Space & Earth / Earth Sciences

created May 31, 2012 | popularity 5 / 5 (1) | comments 0 | with audio podcast

Volcanic super-eruptions may have surprisingly short fuses

Enormous volcanic eruptions with potential to end civilizations may have surprisingly short fuses, researchers have discovered.

Space & Earth / Earth Sciences

created May 30, 2012 | popularity 4.9 / 5 (9) | comments 0 | with audio podcast

Wildfire and an example of its important link to the ecosystem

Traveling the western U.S. state of Nevada in the 1860s, a young American writer named Mark Twain heard a "world of talk" about the beauty of Lake Tahoe and so set out one August day to see the lake perched ...

Space & Earth / Environment

created May 31, 2012 | popularity not rated yet | comments 1

'Like a jet through solid rock': Volcanic arc fed by rapid fluid pulses

In the depths of the earth, it is anything but peaceful: large quantities of liquids carve their way through the rock as fluids, causing magma to form. A research team led by the University of Münster, ...

Space & Earth / Earth Sciences

created May 31, 2012 | popularity 3.7 / 5 (3) | comments 1

Newly found asteroid buzzes Earth

A newly found space rock will give Earth a close shave on May 29, passing by at a distance of just 14,440 kilometers (8,950 miles). That distance puts the small asteroid, named 2012 KT42, in the top ten list ...

Space & Earth / Space Exploration

created May 29, 2012 | popularity 5 / 5 (5) | comments 0

Caltech Rover ready for rock-yard competition in Houston

(Phys.org) -- Later this week, a four-wheeled robot designed and built by Caltech undergraduate students will maneuver, apparently under its own guidance, through various challenges at the NASA Johnson Space ...

Space & Earth / Space Exploration

created May 29, 2012 | popularity not rated yet | comments 0