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This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a
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Ever get a sour stomach after your morning coffee? Well, you might end up switching to a dark roastbecause that coffee concoction may leave you with a happier tummy. That's according to the research presented at the American Chemical Society meeting
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Democratic presidential contender Barack Obama travels to the Middle East and Europe next week as he seeks to bolster his foreign policy and national security credentials with U.S. voters. Obama is also expected to visit Iraq and Afghanistan soon. O
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SCOTT SIMON, HOST: Stunt work is a tough trade - almost as tough as writing our theme music like BJ Leiderman does. Stunt people have to know how to take a poke in the schnoz, get thrown off of buildings and smolder in fiery car crashes. Sure sounds
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Science and Technology Epigenetics and stress Baby blues 科技 外因遗传与压力 新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长
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