An international research team including University of Pennsylvania scientists has shown that the rate of sea-level rise along the U.S. Atlantic coast is greater now than at any time in the past 2,000 years and that there is a consistent link between changes in global mean surface temperature and sea level.
Chinese hackers temporarily brought down the world's fastest-growing social action platform after more than 90,000 people in 175 countries endorsed an online call for the release of internationally acclaimed Chinese artist Ai Weiwei.
Weiwei, best known for his role in the construction of the Beijing Olympic stadium and his recent Sunflower Seeds exhibition at the Tate Modern, has become an increasingly outspoken critic of the Chinese government in recent years, in particular over the handling of the 2008 earthquake in the country's Sichuan province.