And what does it mean that Iran has enriched uranium past the 4.5% level?
Submarines played a major role in Word War I. But the first submersible was actually used, though unsuccessfully, in the Revolutionary War.
According to philosopher Max Weber, science led to humanity's disenchantment. But reaching AI Singularity might spark our sense of wonder all over again.
Over 20 countries have high-speed train travel, carrying 1.6 billion passengers a year. The United States is lagging behind.
Airlines have already flown planes fueled with biofuel-petroleum mixes, and more are coming.
When Google runs a smart city, who owns the data?
In the late 1800s, electric boats were a promising new technology. They are now enjoying a revival.
Gas was in fact one of the first readily available fuels, and shaped spaces and politics in Regency-era London.
Early in the 20th century, Cosmism was all the rage in Russia, inspiring a utopian and mystical view of interstellar travel.
Today we call anyone with a flip phone a Luddite. But the term has radical origins.