HOW DOES A BABY GROW? WHAT HAPPENS AS CHILDREN GROW? HOW DO GIRLS CHANGE AT PUBERTY? HOW DO BOYS CHANGE AT PUBERTY? WHAT HAPPENS WHEN PEOPLE GROW OLD? BRAIN AND SKULL DEVELOPMENTFIND OUT MOREIt…
Internal anatomyExternal anatomyCeratopsian hornsAnkylosaur scutesStegosaur platesSome armoured dinosaursThree major groups of plant-eating dinosaurs were well equipped to defend themselves – some…
Road WarriorClassical MythologyLucky in War, Unlucky in Love: TheseusRoad WarriorA Lot of BullKing Theseus Wants a WifeMidlife Crisis: The Abduction of Helen The dangers on the road from Troezen to…
(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…
Georges Louis Leclerc, Comte De Buffon 1707–1788Georges Cuvier 1769–1832Alexandre Brongniart 1770–1847William Buckland 1784–1856Gideon Mantell 1790–1852Mary Anning 1799–1847Richard Owen 1804–…
(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…
