(Encyclopedia) dinoflagellatadinoflagellatadīˌnōflăjˌəlätˈə, –lāˈtə [key], phylum (division) of unicellular, mostly marine algae, called dinoflagellates. In some classification systems this division…
(Encyclopedia) dream, mental activity associated with the rapid-eye-movement (REM) period of sleep. It is commonly made up of a number of visual images, scenes or thoughts expressed in terms of…
(Encyclopedia) poisonous plant, any plant possessing a property injurious to man or animal. Plants may be poisonous to the touch (e.g., poison ivy, poison sumac), or orally toxic (e.g., poison…
Ancestor of Mammals Discovered The fossil skull of a 260-million-year-old sheep-sized animal was found near Williston on the Northern Cape, South Africa. It is the most primitive member yet…
Downhill DiscoveriesIntermediate-Level Science ProjectsPhysical ScienceCan Water Make a Bottle Rocket Fly Higher?Downhill Discoveries The concepts of potential energy, kinetic energy, drag,…
Harry Potter, Cast at Last
A young actor gets ready to enroll in Hogwarts by Holly Hartman Visit our Harry Potter Page for more news!
This article was posted on January 20, 2000…
The Columbia Encyclopedia is easy to use. All articles are arranged alphabetically with each article heading in boldface type. The headings of biographical articles are inverted and alphabetized by…
You’ve probably heard of the theory of relativity. And you may even know that motion, mass, energy, time and space are all relative. But if you’re confused about what any of that actually means, look…
Solar panelsTemperature controlHeat regulationIdeal body temperatureFuzzy raptorScientists cannot agree whether dinosaurs were coldblooded or warm-blooded. Cold-blooded animals, such as reptiles,…
WHY ARE SOME PLACES SACRED? WHO WORSHIPS ANCESTORS? WHAT IS A FETISH FOR? RITUALSFIND OUT MORELocal religions are unique to tribal or cultural groups living apart from modern societies. They are…
