June 15 Baseball as America opens at the Boston Museum of Science. Visit www.mos.org/exhibits_shows. June 29–July 3 The Ninth International Conference on Permafrost at the University of Alaska Fairbanks. Visit www.nicop.org July 27/28 Southern δ-Aquariids meteor shower peak. Visit www.imo.net/calendar/2008

Carbon dioxide changes undifferentiated cells

A little gravity “Britain’s biggest meteorite strike” (SN: 4/12/08, p. 238) states that “gravitational anomalies” make an offshore area a prime candidate as the possible impact site of a meteorite. Wouldn’t that be magnetic anomalies instead? If it is a gravitational anomaly, I would sure like an article on that alone! Thanks for the great magazine. PETER LINDSAY, SEATTLE, WASH. The craters from extraterrestrial impacts can create measurable gravitational as well as magnetic anomalies (SN: 6/15/02, p. 378), albeit exceedingly small ones. For the area off the Scottish coast, the...

Through June 15 “Darwin’s Garden: An Evolutionary Adventure,” at the New York Botanical Garden. Visit the New York Botanical Garden online. September 27 Scheduled opening of Ocean Hall at the Smithsonian National Museum of Natural History in Washington, D.C. Visit The Smithsonian National Museum of Natural History online. 2009 International Year of Astronomy, a UNESCO and International Astronomical Union initiative. Visit International Year of Astronomy online.

Ancient Skull Puzzles — The 45,000-year-old Neanderthal skull recently assembled from fragments found in Shanidar Cave in Iraq presents a real scientific puzzle to anthropologists because, although his face was very primitive, the back of his head was more like modern man. The description of Shanidar Man as a being who appeared to be a totally different creature depending on whether he was seen coming or going was presented to the American Association of Physical Anthropologists meeting in Cambridge, Mass., by Dr. T. Dale Stewart of the Smithsonian Institution.… Putting the tiny pieces tog...