Compare your wits with the nation's best students by David Johnson Test ConditionsThe following test was given to a random sampling of 566 college seniors. Only one student answered all 34…
Ed Sullivan See also People in the NewsRecent Obituaries Related Links The Emmy® Awards International Consortium of Investigative Journalists Awards Alfred I. duPont â…
(Encyclopedia) radiation sickness, harmful effect produced on body tissues by exposure to radioactive substances. The biological action of radiation is not fully understood, but it is believed that a…
(Encyclopedia)
CE5
A. Structure of a bird wing B. Structure of a bat wing
wings, flight organs of the bird, the bat, and the insect. Birds' wings are pectoral appendages that are basically the…
DistributionUnited StatesSouth AmericaIsle of WightSahara DesertGobi DesertAustraliaAntarcticaDinosaurs lived all over the world, but their fossilized remains are not easy to find, or even,…
PREDATOR AND PREYANGLER FISHOMNIVORESHONEYPOT ANTDIGESTIONFIND OUT MOREUnlike plants, animals cannot make food from sunlight. Animals have to feed to produce the energy they need to grow, move…
The Control CenterAnatomy and PhysiologyThe Central and Peripheral Nervous SystemsYou've Got Some Nerve!Gyri and SulciThe Control CenterSensory and Motor ControlThalamus: The Switching StationSpinal…
(Encyclopedia) needle, implement of metal or other material used to carry the thread in sewing and in various forms of needlework and manufacturing. The earliest needles were merely awls or punches.…
(Encyclopedia) pyridinepyridinepĭrˈĭdēn [key] or azineazineăzˈēn [key], C5H5N, colorless, flammable, toxic liquid with a putrid odor. It melts at −42℃ and boils at 115.5℃. Chemically, it is a…
