Hugh Pickens writes "Although a variety of spore discharge processes have evolved among the fungi, those with the longest ranges are powered by hydrostatic pressure and include 'squirt guns' that are most common in the Ascomycota and Zygomycota. In these fungi, fluid-filled stalks that support single spores or spore-filled sporangia, or cells called asci that contain multiple spores, are pressurized by osmosis. Because spores are discharged at such high speeds, most of the information on launch processes from previous studies has been inferred from mathematical models and is subject to a number of errors, but now Nicholas Money, an expert on fungi at Miami University, has recorded the discharges with high-speed cameras at 250,000 frames-a-second and discovered that fungi fire their spores with accelerations up to 180,000 g, calling it 'the fastest flight in nature.' Money and his students, in a justified fit of ecstasy, have created a video of the first fungus opera."

We participated in this project back in 2004. This year it's hosted by Walden University, and the format is a little less cumbersome than it was four years ago. So go ahead, ask some questions you'd like to see McCain and Obama answer, and they'll go into the pot along with questions submitted through other channels. Later this week you'll have a chance to help moderate the final questions chosen from all sources, and on October 20 you'll be able to see video responses from the two major party candidates. Please limit to yourself to one question per post, and note that questions must be posted no later than 4 p.m. US EDT on Monday, September 29, to be considered.