GMAT
A middleweight black hole weighs in at roughly 500 solar masses, hundreds of times more massive than the lightweight black holes produced by the collapse of individual stars, but thousands or even millions of times less in its mass as the heavyweight giants that lurk in the centers of galaxies.
Ranked among great mathematical scientists such as Archimedes, Kepler, and Newton, Abu Ali al-Hasan ibn al-Haytham, who was born in Iraq in 965 C.E., had experimented extensively with light and vision, laying the foundation for modern optics and also the notion of science being based on experiment as well as on philosophical arguments.
Constructed at least as early as the Sui dynasty (A.D. 581-618), the Altar of Heaven is the oldest known altar used in Chinese state religious practice, more than 1,000 years older than a similar one in Beijing, it is the only altar found so far that predates the Qing dynasty (A.D. 1644-1912).
While Hans Holbein the Younger is most often identified with his English portraits, scholars have long been recognizing him as a superb draftsman and a remarkably versatile artist and who was fundamental in synthesizing the novelties of the Italian Renaissance with the rational tradition of Northern Europe.
The electronics company has unveiled what it claims to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs less than 11 ounces.
Even though her career was cut short when she was in her prime and the fifteen recordings she made were disappointing artistically as well as technically, Olive Fremstad (1871-1951) has never been entirely forgotten by opera aficionados.
Because Miranda, the smallest moon of Uranus, has a large number of different surface features, including craters, mountains, valleys, and fractures, some astronomers suggest that at one time repeated impacts broke the surface apart, and after which the fragments were subsequently rejoined because of mutual gravitational attraction.
A pair of architects in Britain, who say that giant arches, bridges, and walls made of artificial bone could be easier to design and build than conventional structures, and already designed a number of structures, including a bridge, for showing how their idea would work.
A recent poll indicates that many people in the United States hold a combination of conservative and liberal political views; i.e., they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting many specific government programs for health care, education, and the environment.
Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's).