measured mile course
51Nuclear meltdown — Three of the reactors at Fukushima I overheated, causing core meltdowns. This was compounded by hydrogen gas explosions and the venting of contaminated steam which released large amounts of radioactive material into the air.[1] …
52Athletics (sport) — For other uses, see Athletics (disambiguation). Athletics Highest governing body IAAF Characteristics Mixed gender yes …
53ship — shipless, adj. shiplessly, adv. /ship/, n., v., shipped, shipping. n. 1. a vessel, esp. a large oceangoing one propelled by sails or engines. 2. Naut. a. a sailing vessel square rigged on all of three or more masts, having jibs, staysails, and a… …
54Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
55Marathon world record progression — This list is a chronological progression of record times for the marathon. World records in the marathon are now ratified by the International Association of Athletics Federations, the international governing body for the sport of athletics.… …
56The Boat Race — Exhausted crews at the finish of the 2002 Boat Race. Cambridge at the left. The event generally known as The Boat Race is a rowing race in England between the Oxford University Boat Club and the Cambridge University Boat Club, rowed between… …
57Aegean dispute — The term Aegean dispute refers to a set of interrelated controversial issues between Greece and Turkey over sovereignty and related rights in the area of the Aegean Sea. This set of conflicts has had a large effect on the relations between the… …
58History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
59cañada — /keuhn yah deuh, yad euh/, n. Chiefly Western U.S. 1. a dry riverbed. 2. a small, deep canyon. [1840 50; < Sp, equiv. to cañ(a) CANE + ada n. suffix] * * * Canada Introduction Canada Background: A land of vast distances and rich natural resources …
60Canada — /kan euh deuh/, n. a nation in N North America: a member of the Commonwealth of Nations. 29,123,194; 3,690,410 sq. mi. (9,558,160 sq. km). Cap.: Ottawa. * * * Canada Introduction Canada Background: A land of vast distances and rich natural… …
