Medical research

Study overturns 'snapshot' model of cell cycle in use since 1974

Cells have a big decision: Should they replicate or sleep? Healthy cells can go either way. Cancer cells' replication switches are stuck in the 'on' position. Now a study by University of Colorado Cancer Center researchers ...

Diseases, Conditions, Syndromes

Coronavirus could become seasonal: top US scientist

There is a strong chance the new coronavirus could return in seasonal cycles, a senior US scientist said Wednesday, underscoring the urgent need to find a vaccine and effective treatments.

Medical research

Glucose acts as a double edged sword on longevity factor SIRT1

Feeding and fasting cycles exert control over metabolism and energy utilization. Aberrations are known to cause metabolic diseases, liver dysfunctions and accelerated aging. Expression and activity of the anti-aging factor ...

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Cycling

Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, or for sport. Persons engaged in cycling are cyclists or bicyclists. Apart from ordinary two-wheeled bicycles, cycling also includes riding unicycles, tricycles, quadracycles, and other similar human-powered vehicles (HPVs).

Bicycles were introduced in the 19th century and now number about one billion worldwide. They are the principal means of transportation in many regions.

Cycling is a very efficient and effective mode of transportation optimal for short to moderate distances. Bicycles provide numerous benefits compared to motor vehicles, including exercise, an alternative to the use of fossil fuels, no air or noise pollution, much reduced traffic congestion, easier parking, greater maneuverability, and access to both roads and paths. The advantages are at less financial cost to the user as well as society (negligible damage to roads, and less pavement required). Criticisms and disadvantages of cycling include reduced protection in crashes, particularly with motor vehicles, longer travel time (except in densely populated areas), vulnerability to weather conditions, difficulty in transporting passengers, and the skill and fitness required.

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