The obviously intended effect occurred pretty much immediately: the media and internet were set buzzing with widespread speculation as to what exactly this could mean, ranging from the prosaic to the preposterous.
It turns out it was much more prosaic than even many more circumspect commentators had speculated: they discovered evidence that a bacterial strain found on Earth was capable of metabolizing arsenic (As) and incorporating it into structural molecules of the cell...
Read more at: http://creation.com/NASA-ET-suffered-arsenic-poisoning