The Fog at the Beginning of the Universe A team of astronomers from the California Institute of Technology, led by S. George Djorgovski, may have glimpsed the dawn of our universe. In Aug. 2001,…
Why are some foods kosher and others not? by Michael Morrison Passover Dates (from sundown to sundown of the following dates) 2014 — April 14–22 2015 —…
History of ChopsticksHow did the Asian food utensils originate? by David Johnson In much of Asia, especially the so-called "rice bowl" cultures of China, Japan, Korea, and Vietnam…
IN TRAININGON THE MENUEVASPACE MEDICINEFIND OUT MORESince Yuri Gagarin became the first spaceman in 1961, hundreds of space travellers, or astronauts (called cosmonauts if Russian), have…
HOW ARE FOSSILS FORMED? WHAT DO FOSSILS SHOW US? PALEONTOLOGYFIND OUT MOREFossils are the ancient remains of living things preserved in rocks. They are usually formed from hard animal or plant…
WHY WERE MANY DINOSAURS SO BIG? HOW MANY DIFFERENT TYPES OF DINOSAUR WERE THERE? HOW WERE DINOSAURS DIFFERENT FROM REPTILES TODAY? PTEROSAURSICHTHYOSAURSFIND OUT MOREThis group of land-living…
Midlife Crisis: The Abduction of HelenClassical MythologyLucky in War, Unlucky in Love: TheseusRoad WarriorA Lot of BullKing Theseus Wants a WifeMidlife Crisis: The Abduction of Helen Despite the…
(Encyclopedia) fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain…
(Encyclopedia) paleontologypaleontologypāˌlēəntŏlˈəjē [key] [Gr.,= study of early beings], science of the life of past geologic periods based on fossil remains. Knowledge of the existence of fossils…
(Encyclopedia)
CE5
Typical X-ray composite spectrum (intensity as a function of frequency)
X ray, invisible, highly penetrating electromagnetic radiation of much shorter wavelength (higher…
