A rainbow of urine from a hospital lab, photographed by laboratory scientist Heather West. No, it hasn't been artificially colored -- that's exactly how they, er, came out naturally. One of my favorite photos we've ever put on
The scientist bent over the blood slides again, writing his observations in a lined notebook. Ruby wondered who the red semi-liquid belonged to." He muttered, his pen scratching the paper as he scribbled his thoughts down.