Societies forget, and this physicist wants to know why.
A state-by-state breakdown of policies that could change your community.
Both the Atlantic and Pacific areas saw a record number and intensity of storms.
New designs and materials will make future skyscrapers sturdier, safer, and smarter.
The big and bad crises that could wipe out humanity
In a highlight of last week's conference, Gates calls for zero emissions and agrees with Obama: We need nukes
Embryologist Irina Polejaeva talks about the successes and challenges of cloning performance horses
How safe can a citizen expect to be in a post 9/11 city? What technology can a city use to make its citizens safe?
Reporting from the Gulf, an offshore oil rig worker finds mundanity, a complacent obsession with safety, and the doom beneath it all
Last May, a massive tornado leveled Joplin, Missouri. Was it chance, or a warning of things to come?
The best sources to follow the unprecedented torrents of information flowing from the ground via social media tools
Science of the Union.
With a decade of war winding down, post-traumatic stress disorder is an increasingly urgent problem. Will the Army's efforts work?
Did an eruption turn Icelandic vikings into Christians?
Scientists are still working out why some species are more likely to die out than others.
The jury is out, but the answer always entails a healthy dose of biology and sociology.
Residents of one of the Internet's most populous virtual worlds shop, attend class-even run businesses. Soon you may do the same.
In a wide-ranging interview with PopularScience.com, Aldrin talks about a mission to Mars, 34 years of sobriety and the future of American leadership in space.
Solving the mysteries of the universe
Dark energy, gravitational waves, and black holes may be just the beginning