Public health historian Gerald Markowitz reminds us that the problem of lead poisoning is anything but new.
More than 380 people are now believed to have died in the collapse of a clothing factory complex in Bangladesh last week.
But the true number of casualties may never be known, as hundreds are still missing, and the rescue operation is now winding down.
The BBC’s Andrew North reports on the experiences of those who’ve been trying to pull out the survivors.
Robin Young and Jeremy Hobson are hitting the road to cover the elections. Our Tumblr brings you behind the scenes.