People traveled 19 and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people. 20 , people learned that they could drag loads along the ground on sledges. During late prehistoric times...
We also provide the estimates of prevented early deaths for infants based on Woodruff et al. (1997). The results are 13 (95% CI: 4.9–20) in the CTR case, 14 (95% CI: 5.3–22) in the PO case, and 15 (95% CI: 5.9–24) in the NS case. In addition, the results for ...
People traveled 19 and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people. 20 , people learned that they could drag loads along the ground on sledges. During late prehistoric times...