Circumference
51Pi — This article is about the number. For the Greek letter, see Pi (letter). For other uses, see Pi (disambiguation). The circumference of a ci …
52Białowieża Forest — Belavezhskaya Pushcha National Park (BE) / Białowieski Park Narodowy (PL) Belarussian National Park Belavezhskaya Pushcha IUCN Category II (National Park) …
53Abdominal obesity — Central obesity Classification and external resources A morbidly obese male. Weight 146 kg/322 lbs, height 177 cm/5 ft 10 in. The body mass index is 46. ICD 10 E66 …
54Spherical Earth — Medieval artistic representation of a spherical Earth with compartments representing earth, air, and water (c. 1400). The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC …
55History of geodesy — See also the main article on Geodesy. Humanity has always been interested in the Earth. During very early times this interest was limited, naturally, to the immediate vicinity of home and residency, and the fact that we live on a near spherical… …
56Female body shape — has a bearing on a wide range of human activities, and there are and have been widely different ideals of it in different cultures over history. The female figure is usually narrower at the waist than at the chest and hips, and usually has one of …
57Human penis size — is the measured length and width of the human penis. The most accurate measurement of the human penis comes from several measurements at different times, as there is natural variability in size due to arousal level, time of day, room temperature …
58Football (ball) — A football is an inflated ball used to play one of the various sports known as football. The first balls were made of natural materials, such as an inflated pig baldder, sometimes inside a leather cover. (This has given rise to the US slang term… …
59Anthropometry of the upper arm — The anthropometry of the upper arm is a set of measurements of the shape of the upper arms. Large, saggy flaps of skin under the arm are colloquially known as bingo wings,[1] after the phrase was popularised by the comedy television program Bo… …
60Ehrenfest paradox — The Ehrenfest paradox concerns the rotation of a rigid disc in the theory of relativity.In its original formulation as presented by Paul Ehrenfest 1909 in the Physikalische Zeitschrift, it discusses an ideally rigid cylinder that is made to… …
