Catoctin Furnace participant relatedness (IMAGE) Harvard Medical School Caption Site of Catoctin Furnace in Maryland (star) and locations of deidentified study participants (colored dots). Darker dots indicate more participants related to those at the burial site. Credit Harney et al., Science Usage Restrictions noncommercial use, with credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.