The editor who selected this headline just can't quite let it go, can he? The ice melt on Mars only "hints" but it doesn't quite convince the environmentalists that it's solar and not human caused.
But of course, that doesn't mean that global warming on Earth isn't human caused anyway. That's only Mars. They'll figure out some way of weaseling out of it.
I'm suprised to even see this coming from National Geographic considering they're on the front line of the "man is destroying the earth" argument. I've subscribed for years, but every issue now is battle between the articles that require a barf alert due to lefty politics of any kind and the truly informative politically neutral articles. The letters section keeps me going. For every moonbat that writes, there's usually a sanity check from someone else.