In 1671, Italian astronomer Giovanni Cassini discovered Iapetus, Saturn’s most distant moon, and correctly surmised that it was tidally locked to the planet, always showing one light and one dark face. Now, as the Cassini space mission to Saturn returns more data, it Iapetus is showing a new feature – a ridge covering 75% of its equatorial surface.
The incidence of autism increased by 57 percent between 2002 and 2007, according to the Centers for Disease Control. Several recent studies have shown that environmental pollution is tied to that increase. The newest one, to be published in Environmental Health Perspectives, reports that mothers living close to highly trafficked freeways are twice as likely to give birth to autistic babies than mothers who do not.