Stem Cell Development; Four Freedoms Park; Science of Weed

A group of scientists have successfully created embryonic stem cells from skin cells. Bioethicist Arthur Caplan of NYU explains the development and the questions is raises about human cloning. Plus, The Guardian’s Heidi Moore sorts through two “snooping” stories: Bloomberg’s and the AP’s; our May series on marijuana legalization continues with the science behind the drug and what it means for public policy; the details on the new tribute to FDR on Roosevelt Island; and one person’s life featured on the obit page in the Times today.