News
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PaleontologyDNA pegs Irish elk’s nearest relatives
Analyses of DNA of the Irish elk, which died out after the last ice age, may settle a long-running debate about the creature's place on the deer family tree.
By Sid Perkins -
Health & MedicineSilenced gene may foretell colon cancer
A cancer-suppressing gene, which is often shut down in colorectal cancer, is sometimes silenced in healthy colorectal tissues as well.
By Nathan Seppa -
TechGetting a charge out of backpacking
A backpack enhanced with springs, gears, and a generator converts the up-and-down motions of the wearer into enough electricity to power portable electronic gadgets.
By Peter Weiss -
Health & MedicineSharpening the focus of mammograms
Digital mammography can detect up to one-fourth more cancers than traditional film mammography can in women who are under 50, haven't gone through menopause, or who have dense breast tissue.