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Cicada. The cicadas ( / sɪˈkɑːdəz, - ˈkeɪ -/) are a superfamily, the Cicadoidea, of insects in the order Hemiptera (true bugs). They are in the suborder Auchenorrhyncha, [a] along with smaller jumping bugs such as leafhoppers and froghoppers. The superfamily is divided into two families, the Tettigarctidae, with two species in Australia ...
Echidna. Echidnas ( / ɪˈkɪdnəz / ), sometimes known as spiny anteaters, [1] are quill-covered [2] monotremes (egg-laying mammals) belonging to the family Tachyglossidae / tækiˈɡlɒsɪdiː /, living in Australia and New Guinea. The four extant species of echidnas and the platypus are the only living mammals that lay eggs and the only ...
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Novak Djokovic (Serbian: Новак Ђоковић, Novak Đoković, pronounced [nôʋaːk dʑôːkoʋitɕ] ⓘ;[6] born 22 May 1987) is a Serbian professional tennis player who is currently ranked world No. 1 in singles by the Association of Tennis Professionals (ATP). Djokovic has been ranked No. 1 for a record total of 428 weeks in a record ...
Wikipedia is a free online encyclopedia that anyone can edit, and millions already have . Wikipedia's purpose is to benefit readers by presenting information on all branches of knowledge. Hosted by the Wikimedia Foundation, it consists of freely editable content, whose articles also have numerous links to guide readers towards more information.
Amyotrophic lateral sclerosis ( ALS ), also known as motor neurone disease ( MND) or Lou Gehrig's disease in the United States, is a rare but terminal neurodegenerative disorder that results in the progressive loss of both upper and lower motor neurons that normally control voluntary muscle contraction. [3] ALS is the most common form of the ...
The number π ( / paɪ /; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.
