Israeli scientists detect upswings in heart rate and stress and less sleep, especially in southern residents, during 2021 Operation Guardian of the Walls.
SECURITY AND rescue personnel take cover as a siren sounds, warning of incoming rockets from the Gaza Strip, in Sderot, on Thursday.(photo credit: OREN BEN HAKOON/FLASH90)ByJUDY SIEGEL-ITZKOVICHUpdated:
