interlocking disk
21Boy's surface — In geometry, Boy s surface is an immersion of the real projective plane in 3 dimensional space found by Werner Boy in 1901 (he discovered it on assignment from David Hilbert to prove that the projective plane could not be immersed in 3 space).… …
22Carpus — For other uses, see Carpus (disambiguation). Bone: Carpals BONES OF (right) HAND Proximal: A=Scaphoid, B=Lunate, C=Triquetrum, D=Pisiform Distal: E=Trapezium, F=Trapezoid, G=Capitate, H …
23Temnospondyli — Temnospondyls Temporal range: Early Carboniferous Early Cretaceous, 330–120 Ma Possible descendant taxon Lissamphibia survives to present …
24angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction any member of the more than 300,000 species of flowering plants (division Anthophyta) …
25Egypt, ancient — Introduction civilization in northeastern Africa dating from the 3rd millennium BC. Its many achievements, preserved in its art and monuments, hold a fascination that continues to grow as archaeological finds expose its secrets. This article… …
26Placenta — A temporary organ joining the mother and fetus, the placenta transfers oxygen and nutrients from the mother to the fetus, and permits the release of carbon dioxide and waste products from the fetus. It is roughly disk shaped, and at full term… …
27Fernand Léger — Infobox Artist name = Fernand Léger Born = imagesize = 200px caption = Fernand Léger photographed by Carl Van Vechten, 1936 birthname = birthdate = birth date|1881|2|4|mf=y location = Argentan, Orne deathdate = death date and… …
28Pac-Man — This article is about the original Pac Man arcade game from 1980. For other uses, see Pac Man (disambiguation). Pac Man No …
29Electrical connector — Back of an audio amplifier features a variety of electrical connectors An electrical connector is an electro mechanical device for joining electrical circuits as an interface using a mechanical assembly. The connection may be temporary, as for… …
30Rumours — For other uses, see Rumor (disambiguation). I Don t Want to Know redirects here. For other uses, see I Don t Wanna Know (disambiguation). Rumours …
