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First domesticated horses in central Asia more than 5,000 years ago

It's pretty hard to milk a wild mare. So researchers attempting to determine whether ancient Botai in northern Kazakhstan had domesticated horses tested their pottery for evidence that they were as fond as their modern descendants of mare's milk (you can see [ left ] a modern mare being milked by a Kazakh woman)...

March 5, 2009 — David Biello

Are doctors zapping patients with too much radiation?

A new study says that the average American is exposed to six times more radiation from medical tests than in the early 1980s, prompting warnings that physicians may be upping patients' cancer risk by giving them unnecessary exams. 

A study by The National Council of Radiation Protection and Measurements (NCRP) shows that the average American's overall radiation exposure jumped from 3.6 millisieverts (mSv) to 6.2 mSv per year -- almost entirely a result of radiation-based medical tests...

March 5, 2009 — Coco Ballantyne

Good news on coring, not so good news for a member of the crew

Editor's Note: University of Southern California geobiologist Katrina Edwards is taking part in a three-week drilling project at the Atlantic's North Pond—a sediment-filled valley on the ocean floor—designed to locate and study what she calls the “intraterrestrials”: the myriad microbial life-forms living inside Earth's crust...

March 4, 2009 — Katrina Edwards

BPA baby bottles get the boot in one New York State county

Officials in Suffolk County in Long Island, N.Y., this week voted to ban the sale of baby bottles and sippy cups that contain bisphenol A (BPA), a chemical linked to heart disease and diabetes as well as reproductive, immune system and other health problems...

March 4, 2009 — Katherine Harmon

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