Science & the Public

Health & Medicine

PCBs hike blood pressure

No one would choose to eat polychlorinated biphenyls, or PCBs — yet we unwittingly do. And a new study finds that the cost of their pervasive contamination of our food supply can be elevated blood pressure, a major risk factor for heart disease.

Humans

Record chills are falling, but in number only

Weather-monitoring stations in the Lower 48 have been logging record daily highs in temperature at twice the pace of record lows. Yet more evidence of climate warming. Many people have pointed to colder than normal winters — or summers — as evidence that global warming is a myth. Climatologists have countered that weather, the meteorological features that we experience at any given hour or day, may show anomalies even as Earth’s overall climate warms. So weather can locally mask the planet’s overall slowly rising fever. Except that any such mask appears to be disappearing throughout most of the United States, according to a new study.

Earth

Buried-lakes story wins top award

Some readers may be unaware of our sister publication, Science News for Kids, a weekly online magazine for middle-school readers. This morning, we learned that one of the site’s feature stories — Where Rivers Run Uphill — won this year’s top science journalism award for reporting news for children.

Climate

Guarded optimism on Copenhagen climate talks

Negotiators representing 181 nations completed their final prep work in Barcelona, Spain, last Friday, on a new climate treaty — one that they hope to build a month from now at a major conference in Copenhagen, Denmark. But at least one scientist worries that what comes out of the Copenhagen deliberations may not have sufficient coordination and strength to meet the challenges that Earth’s climate has begun throwing at us.

Health & Medicine

Vinegar: Label lead-tainting data

Under California’s Proposition 65 law, products containing chemicals that may cause cancer, birth defects or reproductive toxicity must carry a warning label at their point of sale. Among such products: pricy balsamic and red-wine vinegars that contain lead. At least some California groceries apparently have taken a conservative approach and post labels suggesting all such vinegars are dangerously tainted. Although they aren't.

Health & Medicine

H1N1: Call to revise flu-mask policy

Three groups of healthcare professionals sent a letter to President Obama yesterday asking that he instruct his administration to revise federal flu-mask guidance. What these groups want: formal recognition that two studies last month showed conventional surgical masks are about as protective as the fancy — but much more expensive — N95 respirators in limiting H1N1 infection.

Tech

House passes medical isotopes bill

A spot of encouraging news emerged yesterday on the medical-isotope front. The House of Representatives voted 440 to 17 in favor of a bill to reestablish domestic production of molybdenum-99. It’s the feedstock for the most heavily used nuclear agent in diagnostic medicine.

Tech

Large Hadron Collider suffers carb attack

Efforts to get the Large Hadron Collider up and running just encountered a temporary snag, according to yesterday's online edition of The Times of London. A crusty chunk of bread “paralysed a high voltage installation that should have been powering the cooling unit.”

Earth

Nanoparticles’ indirect threat to DNA

Tiny metal nanoparticles can damage DNA, essentially by triggering toxic gossip.

Health & Medicine

Genome 10K: A new ark

Featured blog: Researchers are working to catalog the DNA sequences of just about every vertebrate genus.

Climate

Kyoto climate treaty’s greenhouse ‘success’

There are 33 days until the opening of formal negotiations in Copenhagen on the next global climate-protection treaty. The hoped-for accord would take up where the current treaty leaves off. But to get some perspective on just where that is, a new United Nations report describes for negotiators and the public just how much the Kyoto Protocol has achieved. And real strides have been made in slowing the growth of greenhouse-gas emissions, thanks to many European nations (albeit with little help from North American ones or Japan).

Humans

H1N1 vaccine: Counting side effects

Pregnant women are considered at high risk for suffering complications or death from the new H1N1 pandemic swine flu. So they’re near the top of the list for getting vaccinated. A new international study calculates that up to 400 out of every million pregnant women who receive such swine-flu shots will experience a miscarriage within 24 hours. But not BECAUSE of their flu shots.