Or,he said human DNA really was present in the bone, but the bone was too small or low-quality to repeat the first results.

VOA: special.2011.03.15

This might put some women at greater risk for heart disease or the bone-thinning disease osteoporosis.

VOA: special.2010.10.12

Or,the DNA in the bone might be non-human.

VOA: special.2011.03.15