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Today there are 6,800 reptile species on earth; the major groups are alligators and crocodiles, turtles, lizards, and snakes.
Reptiles are tetrapods and amniotes, animals whose embryos are surrounded by an amniotic membrane. Today they are represented by four surviving orders: crocodilia (crocodiles, caimans and alligators), sphenodontia (tuataras from New Zealand, squamata (lizards, snakes and amphisbaenids – „worm-lizards”), and testudines (turtles).
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Telelucrul, ca un nou mod de a lucra prin efectuarea unei activităţi (forme de muncă) flexibile în timp şi la distanţă, utilizând tehnologia informaţională şi comunicaţiile avansate, se concretizează în teleactivităţi şi teleservicii. În ultimii ani, s-au dezvoltat rapid noi … Citeşte mai mult
Christmas characters and food, Christmas-linked holidays and music, Santa Claus and traditions. Related to Annunciation, Incarnation; Crucifixion; Advent, the four weeks preceding Christmas; and the period between the day after Thanksgiving and the Sunday after New Year”s Day, the American … Citeşte mai mult
The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their … Citeşte mai mult
Așa cum este definită eugenia, este foarte dificil de făcut o diferențiere clară între știință (medicină, ingineria genetică) și eugenie. Și de stabilit o linie peste care ingineria genetică nu ar trebui să treacă, conform unor norme morale, juridice și … Citeşte mai mult
A comprehensive guide of chess: history, famous games and players, rules, strategy, tactics, chess and the computer, documentation and literature, variants. Chess (the “Game of Kings”) is a board game for two players, which requires 32 chesspieces (or chessmen) and … Citeşte mai mult
A guide for music: compositions, events, forms, genres, groups, history, industry, instruments, language, live music, musicians, songs, musicology, techniques, terminology , theory, music video. Music is a human activity which involves structured and audible sounds, which is used for artistic … Citeşte mai mult
A guide for the cat lovers about the cat behavior, cat attractants, cat breeds, cat health and food, type of cats, cats as pets, fictional cats, films about cats, historical cats. A book full with pictures of the most important … Citeşte mai mult
Birds are among the most extensively studied of all animal groups. Hundreds of academic journals and thousands of scientists are devoted to bird research, while amateur enthusiasts (called birdwatchers or, more commonly, birders) probably number in the millions. Birds are … Citeşte mai mult
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