As we learn more about the BP oil leak, there's more that doesn't make sense. It's been almost six weeks since the explosion, which caused the disastrous gusher in the Gulf of Mexico, and many of the public's questions are still unanswered.

We asked listeners to submit their questions about the oil leak and two experts help us answer many of them. Lisa Margonelli is the director of the New America Foundation’s Energy Policy Initiative and David Biello is the Associate Editor of Environment and Energy for Scientific American Magazine.