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People cycle along the street in Afuá, a city in northern Brazil's Pará state, in January. Since 2002, this city on the banks of the Amazon River has been famously off limits to motor vehicles. Stefan Kolumban hide caption
A man rides a VanMoof brand e-bike in Amsterdam, Netherlands, Aug. 17. Piroschka van de Wouw/Reuters hide caption
Van poof! Dutch e-bike maker VanMoof goes bankrupt, leaving riders stranded
Bicycles have become the only commuting option for many Afghans, who are often unable to afford a ride in a bus or a shared cab as the economy has unraveled under Taliban rule. But the conservative Taliban culture means that women are missing from the ranks of these new riders. Diaa Hadid/NPR hide caption
Just like life, riding my bike doesn't always make sense. But that's why I love it
My Trek mountain bike. Greg Rosalsky/NPR hide caption
Store manager Josh Hayden, left to right, talks with Kay Amey and Jackie Gee about a new bicycle at Eddy's Bike Shop on Tuesday in Willoughby Hills, Ohio. Bike shops in most states were exempt from shutdown orders and sales have been up. Tony Dejak/AP hide caption
Hassan Hajjaj, born in Morocco in 1961, is often called the Andy Warhol of Marrakesh for his fusion of glamour and everyday life. Both are evident in his 2017 portrait Cardi B Unity. The rap star, dressed in a high-fashion outfit, sits on utilitarian green plastic cartons against a textured fabric backdrop. The frame consists of tins of green tea, each decorated with a butterfly. Hassan Hajjaj/Courtesy of Third Line Gallery, Dubai, and Yossi Milo Gallery, New York hide caption
Zakary Pashak started Detroit Bikes when he moved to Detroit in 2011, at a time when the city was reeling. Courtesy of Melany Hallgren hide caption
After impact, the authentic Specialized Evade helmet on the left held up but the counterfeit on the right crumbled. Specialized says the fakes lack reinforced roll cages — internal skeletons that hold the helmets together even after a crash. Courtesy of Specialized Bicycles hide caption
Lauren Geoghegan cycling through Africa. Courtesy of Simply Cycling hide caption
Anthony Rowe, an associate professor at Carnegie Mellon University in Pittsburgh, wants bikes to feed information to nearby cars to avoid collisions. His bike is fitted with an array of precise instruments and a battery hidden in the water bottle. Margaret J. Krauss/WESA hide caption
British Transport Secretary Chris Grayling, seen here after a Cabinet meeting at 10 Downing Street, is seen opening his car door on a passing cyclist in a video that was captured by a bike rider in London. Justin Tallis/AFP/Getty Images hide caption
Leahya Ellis and other spinning class participants use exercise as a way to shake away stress, anger and depression. Bastiaan Slabbers for NPR hide caption
Peloton's New York City cycling studio has a television production facility so that subscribers, using bikes equipped with a waterproof tablet, can ride along at home. Issac James/Courtesy of Peloton Cycle hide caption
A diagram released by the city of Paris shows how cyclists will be able to pass through intersections during red lights. In some cases, they can turn right; in others, they can go straight through. City of Paris hide caption
A cyclist rides through a congested intersection in Portland, Oregon; the state is No. 6 on the League of American Bicyclists' new rankings of U.S. states. Randy L. Rasmussen/The Oregonian /Landov hide caption
A rider gets some air at the newly opened Mega Underground Bike Park in Louisville, Ky. Jacob Ryan/WFPL hide caption
On a bike made by Yerka, parts of the frame hinge open to form a locking bracket. Its designers say the bike can't be ridden if it's stolen. Yerka hide caption
Cyclists can now call AAA and other groups for help when they run into trouble during a ride. Here, cyclists ride near the White House in Washington, D.C., last autumn. Mladen Antonov/AFP/Getty Images hide caption
A Wyoming man has won a Supreme Court case fighting efforts to route the Medicine Bow Rail Trail through his family's property. On this map, the trail is the unmarked route moving from the lower right toward Fox Park, where Marvin Brandt lives. Google Maps hide caption