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Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue. The robin egg blue or sky blue color of the Persian turquoise mined near… Read more: Test 6

Laughter is a typically pleasant physical reaction and emotion consisting usually of rhythmical, usually audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can rise from such stimuli as being tickled,[1] or from humorous stories, imagery, videos or thoughts.[2] Most commonly,… Read more: Test 5

Cryptography, or cryptology,[1] <en.wikipedia.org/wiki/Cryptography#cite_note-1> is the practice and study of techniques for secure communication <en.wikipedia.org/wiki/Secure_communication> in the presence of adversarial <en.wikipedia.org/wiki/Adversary_(cryptography)> behavior.[2] <en.wikipedia.org/wiki/Cryptography#cite_note-2> More generally, cryptography is about constructing and analyzing protocols <en.wikipedia.org/wiki/Communication_protocol> that prevent third parties or the public from reading private messages.[3] <en.wikipedia.org/wiki/Cryptography#cite_note-3> Modern cryptography exists at the intersection of the disciplines of… Read more: test 4

Skunk species vary in size from about 14 to 37 in (36 to 94 cm) long and in weight from less than 1 lb (0.45 kg) (spotted skunks) to 14 lb (6.4 kg) (hog-nosed skunks ).[8] They have moderately elongated bodies, short, muscular legs and five toes on each foot.[9] Skunks have relatively large feet… Read more: Test 3