Adriana Dias and co-authors report a low-cost bioassay for the detection of low concentrations of lead in drinking water. The approach uses a genetically modified strain of Escherichia coli, which ...

Collaterilization of Olam Haba and consequential dreams all touch upon reality in these parshiot (Weekly Torah readings). In the first, a family that lost their father came to Rav Avrohom asking ...