A Parent's Perfect Temperature

In neonatal intensive care units, doctors have long prescribed something remarkably low-tech for premature babies: kangaroo care — holding the infant skin-to-skin against a parent's chest. What researchers discovered is extraordinary. The parent's body temperature automatically adjusts to regulate the newborn's. If the baby runs cold, the parent's chest warms. If the baby overheats, the parent's skin cools. In studies at Karolinska University Hospital in Stockholm, mothers' chest temperatures shifted by as much as two degrees to stabilize their infants.…