Public health historian Gerald Markowitz reminds us that the problem of lead poisoning is anything but new.
While some expectant parents wait to find out the sex of their baby, and others want to know after a couple of months of ultrasounds, a growing number of Americans are now using medical techniques to choose the gender of their child.
Jasmeet Sidhu writes in Slate magazine that U.S. parents tend to prefer girls over boys, and are using expensive reproductive procedures to make sure they deliver a daughter.
One gender selection technique, known as preimplantation genetic diagnosis (PGD), involves culturing embryos to find out what sex the child will be. In another method, sperm is sorted based on whether it carries an X or Y chromosome.
Robin Young and Jeremy Hobson are hitting the road to cover the elections. Our Tumblr brings you behind the scenes.