pile-raising mechanism
21Social Security Trust Fund — The Social Security Trust Fund is the means by which the federal government of the United States accounts for excess paid in contributions from workers and employers to the Social Security system that are not required to fund current benefit… …
222010 Haiti earthquake — 2010 Haiti earthquake …
23Landslide mitigation — Landslides can be triggered by many often concomitant causes. In addition to shallow erosion or reduction of shear strength caused by seasonal rainfall, causes triggered by anthropic activities such as adding excessive weight above the slope,… …
242008 Sichuan earthquake — 2008 Earthquake 2008 Wenchuan Earthquake …
25Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …
26Great fire of Newcastle and Gateshead — [ Handcoloured woodblock engraving from the Illustrated London News, 14th October 1854] The Great fire of Newcastle and Gateshead was a tragic and spectacular series of events starting on Friday 6 October 1854, in which a substantial amount of… …
27Debt of developing countries — The debt of developing countries is external debt incurred by governments of developing countries, generally in quantities beyond the governments political ability to repay. Unpayable debt is a term used to describe external debt when the… …
28Panspermia — (Greek: πανσπερμία from πᾶς/πᾶν (pas/pan) all and σπέρμα (sperma) seed ) is the hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids and planetoids.[1] Panspermia proposes tha …
29Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner …
30Harold Macmillan — The Right Honourable The Earl of Stockton OM PC FRS Prime Minister of the United Kingdom In office …
