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The Intergovernmental Panel on Climate Change must implement changes now to regain lost credibility or it will remain an easy target for critics seeking to score cheap points.
Eight years ago, physicist Neil Turok set up the African Institute for Mathematical Sciences in South Africa. The initiative is now set to expand across the continent.
Sub-Saharan Africa's most densely peopled mainland nation is determined to head off a population crisis. Others should take note, say Josh Ruxin and Antoinette Habinshuti.
Marine cyanobacteria can shrug off viral assault by inactivating the genes involved in virus attachment. But this strategy has a cost: it may affect cell fitness or even favour infection by other viruses. See Article p.604
The most distant quasar yet discovered sets constraints on the formation mechanism of black holes. Its light spectrum has tantalizing features that are expected to be observed before the reionization epoch ended. See Letter p.616
When it comes to measuring physical quantities, the more that quantum uncertainties can be squeezed the better. But when just one atom is involved, demonstrating less squeezing is the real challenge. See Letter p.623
When cardiac muscle cells die during a heart attack, this can lead to heart failure and even death. It now emerges that stem cells of the 'sheet' enveloping the heart can be coaxed to form new muscle after such an event. See Letter p.640
Interference patterns are generated when light from a point source passes through two parallel slits. Electrons emitted from diatomic molecules produce analogous patterns, but these couldn't be observed directly — until now.
A protein called SAMHD1 seems to hinder the infection of key cells of the immune system by HIV-1. Cousins of this virus, however, produce a factor that overcomes the protective effects of SAMHD1. See Letters p.654 & p.658
