Physics
Let chaos keep your secrets safe
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Issue 2526
Woo Suk Hwang shot to fame for his work deriving human embryonic stem cells from cloned embryos – he now faces allegations of unethical conduct
Having spent 10 years insisting it should be free to export GM crops and food, the US is realising other countries may ask them to return the favour
New cryptographic techniques could be good news for everyone except spies and gossip-seeking, phone call-intercepting journalists
Waking up to the grim realities of humans' effect on the US environment took the work of determined image-takers, finds Michael Bond