Tia Sharp This article is more than 10 years oldStuart Hazell searched for incest websites during search for Tia SharpThis article is more than 10 years oldMemory sticks reveal killer's increasing interest in paedophile imagesIn the midst of a high-profile search for Tia Sharp, the man who has admitted in the Old Bailey that he had killed her was searching the internet for incest and sex websites. While the 12-year-old's body lay upstairs in the loft of 20 The Lindens in New Addington, south London, the home he shared with Tia's grandmother, he pursued his growing interest in paedophile images – specifically incest-related.

SEMANTIC ENIGMASWhy aren't the letters on a computer keyboard in alphabetical order? Richard Hearty, Newcastle Upon Tyne UK Because typists have been trained on Qwerty keyboards since the 1860s and noone can be bothered retraining them. Ian, London The "qwerty" keyboard arrangement stems from mechanical typewriters. The keys are arranged to make fast typing difficult as old typewriters would easily jam. Of course humans being adaptable sorts have learned to overcome this obstructionist system and now (some folks) type faster than they talk, or even think.

Science This article is more than 1 month oldAI scientists make ‘exciting’ discovery using chatbots to solve maths problemsThis article is more than 1 month oldBreakthrough suggests technology behind ChatGPT and Bard can generate information that goes beyond human knowledge Artificial intelligence researchers claim to have made the world’s first scientific discovery using a large language model, a breakthrough that suggests the technology behind ChatGPT and similar programs can generate information that goes beyond human knowledge.

New East networkUkraineThe chaos of eastern Ukraine has taken a heavy toll on this Soviet-era winery, which once supplied more than half the country You would not know from Yuri’s calm demeanour, as he describes the bubbles rising in his champagne flute, that that we are only a few miles from the frontlines in eastern Ukraine. Violence flares in war-weary Ukraine as US dithers and Russia pouncesRead moreProtected by more than 80 metres of rich black earth, the Soviet-era winery known for its fizzy cabernet sauvignon and merlot sits beneath the battlefields that, in recent weeks, have seen a fresh wave of violence between Russia-backed separatists and the Ukrainian army.

Nigel Slater. Styling: Andie Redman Photograph: Pål Hansen/The ObserverNigel Slater. Styling: Andie Redman Photograph: Pål Hansen/The ObserverThe ObserverFoodOn the 20th anniversary of his bestseller, Nigel Slater tells how it all began … and how it went to stage and screen Toast is 20. But the memoir that chronicled my childhood (cooking, eating, crying, and a few other “ings” a wiser author might have left out) started life as neither book, film nor stage play, but as an article in the Observer.