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History of the bicycle. 1886 Swift Safety Bicycle. Vehicles that have two wheels and require balancing by the rider date back to the early 19th century. The first means of transport making use of two wheels arranged consecutively, and thus the archetype of the bicycle, was the German draisine dating back to 1817.
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...
Grasshoppers are diurnal insects—meaning, they are most active during the day time. Grasshoppers have had a long relationship with humans. Swarms of locusts can have devastating effects and cause famine, having done so since Biblical times. [2] Even in smaller numbers, the insects can be serious pests.
Young tigresses establish their first home ranges close to their mother's while males migrate further than their female counterparts. Four radio-collared females in Chitwan dispersed between 0 and 43.2 km (0.0 and 26.8 mi) and 10 males between 9.5 and 65.7 km (5.9 and 40.8 mi). [89]
The history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. The similarities among all known present-day species indicate that they have diverged through the process of ...
The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs . Eon.
Life cycle assessment ( LCA ), also known as life cycle analysis, is a methodology for assessing environmental impacts associated with all the stages of the life cycle of a commercial product, process, or service. For instance, in the case of a manufactured product, environmental impacts are assessed from raw material extraction and processing ...
The first documented cycling race was a 1,200 metre race held on May 31, 1868, at the Park of Saint-Cloud, Paris. It was won by expatriate Englishman James Moore who rode a bicycle with solid rubber tires. [3] The first cycle race covering a distance between two cities was Paris–Rouen, also won by James Moore, who rode the 123 kilometres ...
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