(Encyclopedia) pentimentopentimentopĕnˌtəmĕnˈtō [key], painter's term for the evidence in a work that the original composition has been changed. Often the opaque pigment with which the artist covered…
WHAT AFFECTS AN AREA’S CLIMATE? WHY DO TROPICAL REGIONS HAVE HOT CLIMATES? WHAT IS A CONTINENTAL CLIMATE? FIND OUT MORE
Every part of the world has its own climate—a characteristic…
(Encyclopedia) pulsar, in astronomy, a neutron star that emits brief, sharp pulses of energy instead of the steady radiation associated with other natural sources. The study of pulsars began when…
PINHOLE CAMERAFILM CAMERAMILESTONES OF PHOTOGRAPHYPHOTOGRAPHIC FILMDIGITAL PHOTOGRAPHYFIND OUT MOREA camera is a device that records pictures. It consists of a sealed box that catches the light…
(Encyclopedia)
CE5
Sextant
sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical…
(Encyclopedia) gamma radiation, high-energy photons emitted as one of the three types of radiation resulting from natural radioactivity. It is the most energetic form of electromagnetic radiation,…
(Encyclopedia) electric fish, name for various fish that produce electricity by means of organs usually developed from modified muscle tissue. The electric eels of South America are freshwater…
The ringleader of the murders, Edgar Ray Killen, was convicted on June 21, 2005, the 41st anniversary of the crimes
by Borgna Brunner Related Links Black History Month…
WHEN DID PEOPLE FIRST STUDY THE SKY? WHAT DO ASTRONOMERS STUDY TODAY? TELESCOPESFIND OUT MOREAstronomy is the science that studies the stars and all the other bodies (objects) in space. The…
