►http://www.boston.com/bigpicture/2012/06/pedal_power.html
Congolese boys push a Chikudu (wooden bicycle) as they transport goods to the market of Mushaki, Democratic Republic of Congo on December 4, 2011. Chikudus are as much a source of local pride as they are a part of the local economy. Formal jobs are rare here, and crafting chikudus is a skilled and prestigious occupation. Chikudus are the brainchild of desperate improvisation. Before they overtook the dusty foot paths and rocky roads of eastern Congo, men carried produce to market in wheelbarrows. No one is certain when chikudus were invented, or by whom, but locals agree they appeared after independence from colonial Belgium in 1960. By then bicycles and motorcycles had reached Congo, and chikudu makers tried to replicate their functionality. (Simon Maina/AFP/Getty Images)
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Biological analyst Alan Dowden of the Seattle Sperm Bank rides the Sperm Bike, a custom-designed, high-tech bicycle used to deliver donated sperm to fertility clinics in Seattle on November 8, 2011. (Anthony Bolante/Reuters)
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