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The African helmeted turtle (Pelomedusa subrufa) is a species of side-necked terrapin in the family Pelomedusidae.The species naturally occurs in fresh and stagnant water bodies throughout much of sub-Saharan Africa, and in southern Yemen. It is omnivorous, with its diet consisting mainly of aquatic invertebrates, small fish, and vegetation.
Wikipedia[c] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1][2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the behavioural sciences (...
The World Wide Web (WWW or simply the Web) is an information system that enables content sharing over the Internet through user-friendly ways meant to appeal to users beyond IT specialists and hobbyists. [1] .
Principal language families of the world (and in some cases geographic groups of families). For greater detail, see Distribution of languages in the world. This is a list of languages by total number of speakers. It is difficult to define what constitutes a language as opposed to a dialect.
In mathematics, hyperbolic functions are analogues of the ordinary trigonometric functions, but defined using the hyperbola rather than the circle. Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the unit hyperbola.
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha[1] (or Selachii) and are the sister group to the Batoidea (rays and kin).
