(Encyclopedia) stromatolite, layered structures produced by the binding together of sediments by a thin layer of cyanobacteria. The layers, which are deposited very slowly, gradually produce rounded…
(Encyclopedia) superstition, an irrational belief or practice resulting from ignorance or fear of the unknown. The validity of superstitions is based on belief in the power of magic and witchcraft…
(Encyclopedia) Tizard, Sir Henry Thomas, 1885–1959, English physical chemist and scientific adviser. He was educated at Westminster school and Magdalen College, Oxford, from which he received honors…
(Encyclopedia) trill, in music, ornament consisting of the more or less rapid alternation of two adjacent notes. Indicated by any of several conventional symbols, it varies in speed and duration and…
(Encyclopedia) rook, term used for a common Eurasian bird (genus Corvus) of the family Corvidae (Crow family), smaller than the American crow. The jackdaw is a European species of the genus. Rooks…
(Encyclopedia) S, 19th letter of the alphabet, representing the common sibilant, voiceless in spur, voiced in rose. Its Greek equivalent is sigma. In former times the nonterminal s was written or…
(Encyclopedia) sea nettle, any one of several species of stinging jellyfish, common along coasts and much feared by swimmers. Most stings are painful but are not dangerous to man; however, certain…
(Encyclopedia) brown recluse spider or violin spider, poisonous nocturnal spider, Loxoceles reclusa, most common in the SE and S central United States. Adults are 3&fslsh;8 in. (10 mm) long and…
(Encyclopedia) lionfish, common name for a genus (Pterois) of the family Scorpaenidae (see rockfish), comprising venomous subtropical marine fish native to the South Pacific, the Indian Ocean, and…
(Encyclopedia) milkweed, common name for members of the Asclepiadaceae, a family of mostly perennial herbs and shrubs characterized by milky sap, a tuft of silky hairs attached to the seed (for wind…
Trending
Here are the facts and trivia that people are buzzing about.
World's Most Corrupt Leaders & Politicians
Western Christian Holidays, 2010-2030
The Best Movie Quotes of All Time!
Top 10 Biggest Waterfalls in the World (Tallest, Widest, & Most Volume!)
