Today's headlines from science and tech.

Here are today's most interesting science, health, and tech news reports. For analysis and commentary from around the Web, check out the  hot topics page. For Human Nature's takes, visit the blog. To add your own take, open or join a discussion thread in the Fray—and please link to the original story so others can participate intelligently in the conversation.

June 6

Britain, having banned guns, will prosecute anyone 16 or older who carries a knife
(Kevin Sullivan and Jill Colvin, Washington Post)

McCain camp endorses warrantless monitoring of phone calls and email|
(Douglas Holtz-Eakin, National Review / Charlie Savage, New York Times)

Company tests drugs that promote growth of new brain cells
(Emily Singer, Technology Review)

Child-care robots become so useful that parents might leave kids with them
(Roger Highfield, Daily Telegraph)

Why the huge racial gap in diabetic amputations?
(Dartmouth Institute for Health Policy and Clinical Practice / AFP / New York Times)

Study says cancer surgeons remove anal sphincters too often
(David Forman et al, Gut / BBC News)

Two genes plus drugs makes adult cells become embryonic
(Roger Highfield, Daily Telegraph)