Scientific American Magazine

Could cosmic inflation be a sign that our universe is embedded in a far vaster realm

Information technology, satellite imaging and research carried out in disaster-relief areas have begun to transform humanitarian aid into a more efficient and less haphazard endeavor

Countries are altering their nuclear arsenals, prompting the U.S. to refurbish its own warheads

A new technology that mimics the way nature gives bright color to butterfly wings can make cell phone displays clearly legible, even in the sun's glare

A look at strike capabilities worldwide, and how a bomb would affect single cities and people.

There's more to blood banking than just bagging blood

Scientists now recognize that vitamin D does much more than build strong bones and that many people are not getting enough of it. Is widespread D deficiency contributing to major illnesses?

Researchers have proposed potential therapies for a paralyzing disorder once thought to be untreatable

The U.S. government's proposal to build the first new nuclear warhead in two decades raises a host of questions