Those of you who live in America got to enjoy the fireworks last Friday, but the whole world was treated to a sky show on a cosmic scale. Since July 4, Mars , Saturn , and our own Moon were doing the tango on the constellation of Leo. Mars and Saturn will continue this dance, and on July 10th, they will converge for their closest encounter in the next 14 years. So if you missed the fireworks, get a telescope out and go ( bad pun alert ) go dancing with the stars. (Yes, I hate myself now.) Check out these sky maps if you want to know where to look in the sky for them. These maps are for July 4th to the 6th, and the 10th: Speaking of stars, we might be getting into trouble with our own. New findings from polar scientists have shown that there's a huge possibility that there won't be any ice on the North Pole this summer. If the ice actually melts, people will be able to get to the pole by sailing instead of trudging on the ice. It is a testament to the effects of global warming . I'm one of those who view environmental issues with the knowledge that the Earth will go on with or without humans. It was here long before us, and it will be here long after we're gone. In the long run, and on a cosmic scale, what we do here doesn't matter - unless we actually blow it up. Which I won't be surprised to find out if it was actually in our power to do. The Earth is old. Far older than we can imagine. It has a history of life we've only glimp ...