Podcast: September Physics News Roundup

School has started and Halloween's just around the corner: that mean's it's time for our September news podcast! First up: do you know how old your water is? New research shows that some of the water on Earth predates the birth of the sun (paper here; story in Nature News here). Second story: researchers have detected the faint signal from neutrinos born in the heart of the sun (paper here; story in Scientific American here). And finally, a spintronic flashlight (paper here; story in Physics Wor...