An overdose of numbing medications can cause fatal side effects if too much of the medicine is absorbed through your skin or gums and into your blood. This is more likely to occur when using a numbing medicine without the advice of a medical doctor (such as during a cosmetic procedure like laser hair removal).
Largest Beaver Dam Seen From Space. The dam in northern Canada spans 2,800 feet and has likely been under beavers' construction since the mid-1970s. A Canadian ecologist has discovered the world's largest beaver dam in a remote area of northern Alberta, an animal-made structure so large it is visible from space. Researcher Jean Thie said Wednesday he used satellite imagery and Google Earth software to locate the dam, which is about 850 meters (2,800 feet) long on the southern edge of Wood Buffalo National Park.
The Three Gorges Dam is the World's Largest Hydroelectric Dam. Geography. Chinaâs Three Gorges Dam is the worldâs largest hydroelectric dam based on generating capacity. It is 1.3 miles wide, over 600 feet in height, and has a reservoir that stretches 405 square miles. The reservoir helps control flooding on the Yangtze River basin and allows 10,000-ton ocean freighters to sail into the interior of China six months out of the year.