Researchers propose a mathematical definition of cell death / Drosophila study uncovers molecular details of how cell death is controlled during epithelial tissue remodeling / Researchers examine protein arrangement in cell membrane that triggers programmed cell death / New method can evaluate enzyme involved in process associated with cancer cell death / Researchers discover that a rare fat molecule helps drive cell death / In potential cancer breakthrough, newly found 'kill switch' triggers death of cancer cells: 'One-two punch'