Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Next week, African leaders will come together to talk about science and technology at a summit in Ethiopia. This presents an opportunity to allot some foreign aid and, if they get it right, to launch projects that will draw further donations from abroad, says Michael Cherry.
Taking hormones to replace those lost during menopause helps many women with their symptoms, yet it may also cause cognitive decline. Could the age at which hormones are taken determine whether they will be beneficial or harmful? Tom Siegfried reports.
Statistics have the power to trip everyone up — including judges and juries. Even when extra care is taken to get the numbers right in court, confusion often reigns. Mark Buchanan reports.
Containing a potential HIV explosion in the strife-torn Niger delta is a tough job — but circumstances are forcing the oil and gas industries to confront it. Colin Macilwain reports.
Life is full of events that are basically games, from paying for a meal to bidding in an auction. Can incorporating a quantum strategy into the rule book increase your chances of winning? Navroz Patel reports.
Manipulating society has traditionally been the preserve of politicians and the gods. Does the current boom in virtual worlds give social scientists and economists an opportunity to join them? Jim Giles investigates.
