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the nano world is really, really bizarre. when matter is reduced to its smallest dimensions, it's made up of quantum dots — nanoparticles so tiny that their size determines their properties. alexey ekimov, moungi bawendi and louis brus discovered and developed this artificially created collection of semiconducting nanoparticles. they are just a few millionths of a millimetre wide and glow blue, red or green when exposed to light. quantum dots already have commercial and scientific uses and, infuture, could contribute to flexible electronics, thinner solar cells and encrypted quantu...

a moment in history — the coronation of king charles iii. god save the king! congregation: god save the king! - cheering across three days in may, the nation celebrated the newly crowned king and queen. at a star—studded concert, a poignant tribute from prince william. as my grandmother said when she was crowned, coronations are a declaration of our hopes for the future. and i know she's up there fondly keeping an eye on us. and she'll be a very proud mother. cheering also this year, prince harry reveals family secrets in his bestselling memoir and in evidence as he takes on the ...

Under investigation. He was detained on thursday on suspicion of criminal damage and dangerous driving. Now on bbc news, Sudan Fighting caught in the shrapnel. Gunfire. Its mid april. As violence breaks out in sudan, disturbing images of possible war crimes are emerging, being carried out on medical facilities and staff by both sides. The warring factions of formerly allied militia empty the streets of the capital. We wanted our contact on the ground to verify whats going on, but its impossible. Using Satellite Data and mapping tools, we analysed User Generated Content on a huge scale and spok...

where there is fighting. he also told reporters he did not demand a ceasefire. mr netanyahu said he reiterated that the war will continue until all the objectives are met. from jerusalem, our correspondent lucy williamson has more. explosions. in gaza, this is the new normal — drone strikes in the border town of rafah, emptying the local market. 17—year—old joe, filming on his phone, still clutching his bag of shopping and calling on god for protection. america has blocked un calls for a ceasefire. israel says it needs to keep fighting to keep up the pressure on hamas. if you w...

hello. i'm nancy kacungira. ukraine's most senior security official has said the country is ready to launch its long—expected counter—offensive against russian forces. in a rare interview, oleksiy danilov told the bbc the planned assault was an "historic opportunity" but the government had "no right to make a mistake" when making such an important decision. mr danilov has been speaking to our diplomatic correspondent, james landale. we have been talking about this counteroffensive for months, and during that time ukraine has been building up stockpiles of ammunition, it's been ta...