Turns out the scientists may be starting to clue in on the fact that the mabul occurred. Not that they see it that way, mind you...
But seriously, is it hard to transfer toxic gas caused by, hmmm, fire and lava, to the boiling water of the mabul? I can draw parallels, and it's been more than 2 decades since my last pure science course. And you'll note that the scientists attest to only a fraction (10%) of life having remained after the stated mass extinction. If you factor in all the ocean life, makes sense to me.
Maybe I should call up Discovery Channel and tell them a pass along to the researchers a short chapter they should read sometime. Sure would save them a whole lot of time and effort. In these economic times though, one shouldn't cause entire projects to go away.