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
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?
There's more to blood banking than just bagging blood
The U.S. government's proposal to build the first new nuclear warhead in two decades raises a host of questions
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
A look at strike capabilities worldwide, and how a bomb would affect single cities and people.
Researchers have proposed potential therapies for a paralyzing disorder once thought to be untreatable
Could cosmic inflation be a sign that our universe is embedded in a far vaster realm
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