Weekly Science Blog Roundup

• Isabella Rossellini writes, directs, and stars in a film series on bug sex. Not much more to say than that. • James Hrynyshyn discusses whether we should care about the now-officially-endangered polar bears, while Gene Expression debates whether they're even a separate species. • Ever wonder how nature shows get all those great shots of animals in the wild? Here's a clue. (And here's basically the best nature video ever, in case you haven't seen it yet.) • No matter how sage it may be, we just aren't as willing to take free advice over the paid variety. • Is "global cooling" a real phenomenon? The guys at RealClimate wouldn't bet on it. • And just in case you thought carbon overload wasn't a big enough problem for the earth, now we've got too much nitrogen as well.