In the Feb. 18 SN: Anniversary of a celebrity supernova, readying for the next stellar explosion, human-animal chimeras, hottest year on record, molecules tied in knots, cancer results don’t reproduce and more.
X-RAY ANOMALY NASA’s Earth-orbiting Chandra telescope has found hints of a mysterious bump in a plot of X-rays. Scientists think the excess X-rays may be the result of decaying dark matter particles.
MISPLACED MATTER A search for dark matter by the XENON100 experiment has found nothing. Photomultiplier tubes within the detector, shown above, detect light produced in interactions possibly caused by dark matter particles.