ﺍﻛﺘﺸﻒ ﺑﺎﺣﺜﻮﻥ ﻧﻬﺮﺍ ﺟﺪﻳﺪﺍ "ﺳﺮﻳﺎ" ﻓﻲ ﺃﺭﻳﺤﺎ