A man-made attempt to save the rarest fish on Earth (its a guppy!)

Olin Feuerbacher took a deep breath and plunged into the warm aquamarine water of a $4.5-million 100,000-gallon concrete and fiberglass tank in the middle of the Mojave Desert. Twenty feet beneath the surface, Feuerbacher inched his way across the bottom, methodically scanning the darkened corners with a flashlight.  He surfaced with a grin and some good news: “We have a new baby down there.” It was a Devils Hole pupfish , the rarest fish on Earth. Read the rest here 10:44