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Bethlehem Steel, once a symbol of American industry, went bankrupt in 2001. These photos help us imagine its glory days. Photographs by Jeremy Blakeslee
Better Place’s switching stations allow electric cars to swap batteries during long trips.Photographs by Gil Lavi
Researchers at HP are scaling up a process for making silicon electronics on rolls of plastic.
How to make strong, conductive fibers hundreds of meters long.
A versatile new process for making biofuels could slash their cost.
How Google maps the world.
A look back at the original motherboard: Steve Wozniak’s 1976 Apple I.
What’s a tweet worth? The Web is redefining what’s valuable and letting people create personal wealth in surprising new ways.
Wind and solar power are ramping up quickly, but the world’s demand for electricity is growing much faster.
Photos from near space for less than $150.