Engineering
We all know the feeling. You're on your way to an important appointment when disaster strikes. A glitch in the transport matrix leaves you waiting for a train that never arrives, or in bumper-to-bumper traffic with little ...
Oct 22, 2019
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Energy & Green Tech
National Park Service officials say motorized electric bicycles are now allowed in Yellowstone, Grand Teton and Glacier national parks, along with Wyoming's National Elk Refuge.
Sep 19, 2019
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Energy & Green Tech
Robert Werner and his wife Ursula usually make time to say a friendly hello to hikers as they ride their gently whirring e-bikes up trails in the Bavarian Alps.
Sep 8, 2019
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Energy & Green Tech
Jason Hall, cofounder of the massive group bicycle ride known as Slow Roll Detroit, had a flip response the first time someone asked whether he wanted to try their new electric motor-assisted bicycle, called an e-bike.
Sep 4, 2019
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Energy & Green Tech
Motorized electric bicycles may soon be humming along serene trails in national parks and other public lands nationwide. It's part of a new Trump administration order—hotly opposed by many outdoors groups—that will allow ...
Aug 30, 2019
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Engineering
A team made up of members from a host of institutions in China, one in Singapore and one in the U.S., has built a hybrid chip that can control an autonomous bicycle. In their paper published in the journal Nature, the group ...
Hi Tech & Innovation
Inventor Andrea Mocellin is posting a video earlier this month that reflects his desire to spur interest in his multi-year effort to get something right: A foldable wheel with design to make a difference in how people can ...
A bicycle, bike, or cycle is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other. A person who rides a bicycle is called a cyclist or a bicyclist.
Bicycles were introduced in the 19th century and now number about one billion worldwide, twice as many as automobiles. They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services, and competitive sports.
The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885. Many details have been improved, especially since the advent of modern materials and computer-aided design. These have allowed for a proliferation of specialized designs for particular types of cycling.
The invention of the bicycle has had an enormous impact on society, both in terms of culture and of advancing modern industrial usage. Several components that eventually played a key role in the development of the automobile were originally invented for the bicycle - e.g., ball bearings, pneumatic tires, chain-driven sprockets, spoke-tensioned wheels, etc.
This text uses material from Wikipedia, licensed under CC BY-SA
