 Australian rangers have killed an invasive monster cane toad discovered in the wilds of a coastal park -- a warty brown specimen as long as a human arm and weighing 2.7 kilograms 6 pounds.The toad was spotted after a snake slithering across a track forced wildlife workers to stop as they were driving in Queenslands Conway National Park, the state government said.I reached down and grabbed the cane toad and couldnt believe how big and heavy it was, ranger Kylee Gray said, describing how s... 