Yes, very nice picture, it brought back vivid memories. I spent 5 weeks camped in what is now the Nahanni National Park, NWT somewhat east of Yellowknife. I was employed for free as a "Sherpa". We had spent several weeks on Death Lake surrounded by 600 foot cliffs, surveying caves and canyon mazes. We watched midnight sunsets but did not stay up until dark. Then we were transported by helicopter to Mosquito Lake, a prearranged meeting place. After the chopper pilot carried our equipment and supplies over, he told us he had chased off the largest grizzly he'd ever seen. When we got there, we discovered the griz had ransacked a poorly cached supply tent, ripping tea chests to shreds opening canned hams with teeth, the holes of which you could stick a thumb through.

We had no radio, and could only send messages by occasional chopper pilots. Our only gun was a 30.30---just big enough to piss off a griz, unless you could nail him right through the nose and into the brain. I got night watch. We had built a bonfire from the wreckage of our cache. I thought I might be able to see the glow of his eyes before he got to me, but that was about it. Then I looked up to see the most amazing river of light, swirling, cascading iridescence, but uncannily quiet, a river as big as the Mackenzie, greens, purples and pinks, an endless flock of rainbows, then gone like someone turned out the lights.

We didn't see the griz, and were moved to another camp, to roam another karst maze. The geographers at Mc Masters were able to convince the Park Service to attach the Giant Karst area to the newly formed Nahanni National Park.

Larry

> _http://antwrp.gsfc.nasa.gov/apod/ap090922.html_ 
> (http://antwrp.gsfc.nasa.gov/apod/ap090922.html) 
>  
> thanks to whoever introduced us to astronomy picture of the day.   c
> 
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