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As Nasa prepares to retire its fleet of space shuttles, it is encouraging private companies to build new rockets to get its astronauts into orbit. Among the firms landing huge contracts to build the next generation of spacecraft is SpaceX. Science correspondent David Shukman visited the company's rocket factory in California for a look inside the prototype capsule.

A ground-breaking report released today highlights the wide range of health care needs affecting older women.

UN climate chief Christiana Figueres, shown here in 2010, told governments to prepare for a gap on the expiry of pledges under the Kyoto Protocol, which has formed the foundation of the world's efforts to cut carbon emissions. Commitments by most developed countries to cut emissions are likely to expire at the end of next year without a new round of legally binding pledges, she warned.

The current focus on assessment means the public debate is overlooking how schools are engaging young people and preparing them for the future, according to Lyn Yates, Professor of Curriculum in the University of Melbourne's Graduate School of Education.

Climate scientists have told city planners that based on current trends, Chicago will feel more like Baton Rouge than a Northern metropolis before the end of this century. So, Chicago is getting ready for a wetter, steamier future. Public alleyways are being repaved with materials that are permeable to water. The white oak, the state tree of Illinois, has been banned from city planting lists, and swamp oaks and sweet gum trees from the South have been given new priority. Thermal radar is being used to map the city's hottest spots, which are then targets for pavement removal and the addition of vegetation to roofs. And air-conditioners are being considered for all 750 public schools, which until now have been heated but rarely cooled.