Author name: Threeyzmonkeys

#1174 How do submarines navigate?

How do submarines navigate? Submarines navigate using a mix of sonar, inertial navigation systems, and GPS. There are a lot of naval and civilian submarines in the world. The number of civilian submarines would probably be easier to work out than the number of military ones because most countries keep that number a secret. Or,

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#1170 What happened at Roanoke?

What happened at Roanoke? Roanoke was the first permanent English colony founded in North America and within 3 years all of the colonists had vanished. It is still a mystery. There are five basic theories. The colonists were killed by Native Americans. They were killed by the Spanish. They returned to England. They assimilated with

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#1168 How does an earthquake resistant building work?

How does an earthquake resistant building work? Architects and engineers can make buildings that resist earthquakes by reducing how much the buildings move horizontally when an earthquake occurs. Earthquakes are an unavoidable natural disaster. They can be caused by volcanic activity, collapsing mountains, or they can be caused by the motion of tectonic plates. When

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