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Meet the Ethiopian entrepreneur who is reinventing ammonia production

Haile, now at Northwestern University, recalls thinking that Abate was particularly eager. As a visible Ethiopian scientist, she gets a lot of email requests, but his stood out. “No obstacle was going to stand in his way,” she says. It was risky to take on a young student with no research experience who’d only been in the US for a year, but she offered him a spot in her lab. Abate spent the summer working on materials for use in solid oxide fuel cells. He returned for the following summer, then

How Does an Electric Bicycle Work? (2025)

An electric bicycle—it's a regular bicycle, but with a motor on it! There are enough moving pieces on these personal mobility vehicles to make buying one confusing. Even if you're pretty sure you know what an electric bicycle is—and that you're not, riding, say, an electric motorcycle from a dealership—the technology changes almost daily. Over the past 10 years, battery capacity has increased by around 50 percent, according to Joe Buckley, the e-mountain bike product manager at Specialized. In