the trench itself made by digging
21Pugio — The pugio was a small dagger used by Roman soldiers as a sidearm. It seems likely that the pugio was intended as an auxiliary or backup weapon, but it found many uses, especially as a utility knife. Officials of the empire took to wearing ornate… …
22Tunnel of Eupalinos — The Tunnel of Eupalinos or Eupalinian aqueduct (in Greek: gr. Efpalinion orygma , Ευπαλίνιον όρυγμα) is a tunnel of 1,036 m length in Samos, Greece, built in the sixth century BC to serve as an aqueduct. The tunnel is the second known tunnel in… …
23Cultivator No. 6 — was the code name of a military trench digging machine developed by the British Royal Navy at the beginning of World War II. The machine was originally known as White Rabbit Number Six; this code name was never officially recognised, but it was… …
24Landslide 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,… …
25international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
26Tunnel — This article is about underground passages. For other uses, see Tunnel (disambiguation). Underground tunnel for heatpipes between Rigshospitalet and Amagerværket in Denmark …
27Phoenix (spacecraft) — This article is about the Mars lander. For the Star Trek spacecraft, see Phoenix (Star Trek). For other uses, see Phoenix (disambiguation). Phoenix Mars Mission Artist s impression of the Phoenix spacecraft as it lands on Mars Operator NASA …
28Syro-Palestinian archaeology — is a term used to refer to archaeological research conducted in the southern Levant. Palestinian archaeology is also commonly used in its stead,Davis, 2004, p. 146.] Dever, 2001, p. 61.] particularly when the area of inquiry centers on ancient… …
29tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
30Opportunity rover — (MER B) Opportunity in April 2003 Operator NASA Mission type Rover …
