Neutrino particle 'flips to all flavours'

altAn important breakthrough may be imminent in the study of neutrinos. The multinational T2K project in Japan says it has seen indications in its data that these elementary particles can flip to any of their three types. The results are provisional because experiments had to be suspended in the wake of the Tohoku earthquake in March. But if confirmed, they would open the door to further research on where the matter in the Universe came from.

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Antimatter atoms are corralled even longer

altScientists have succeeded in trapping atoms of anti-hydrogen for more than 15 minutes. The feat is a big improvement on efforts reported last year that could corral this mirror of normal hydrogen for just fractions of a second at best. The researchers tell Nature Physics journal that they can now probe the properties of antimatter in detail. This will help them understand why the Universe is composed of normal matter rather than its opposite.

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Einstein em órbita

altQuase um século depois de Albert Einstein ter formulado a teoria da relatividade geral, as missões espaciais LARES e LISA vão tentar comprovar as suas previsões mais extraordinárias e difíceis de demonstrar.

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Exposição sobre Marie Curie no Museu da Ciência da UC

altNo âmbito das comemorações do Ano Internacional da Química e do centenário da atribuição do Prémio Nobel da Química a Marie Curie, o Museu da Ciência da Universidade de Coimbra (UC) inaugura, no dia 27 de Abril, às 17 horas, uma exposição sobre a vida e obra desta investigadora, a primeira mulher a conquistar um Nobel. Maria Skłodowska Curie: Madame Curie é uma exposição organizada em colaboração com os Arquivos da Academia das Ciências da Polónia, o Museu de Maria Skłodowska Curie, em Varsóvia, e o Museu Curie, em Paris.

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Universo na mão

altImitar o Sol para produzir energia, estabelecer uma base em Marte ou saber de que é feito o cosmos constituem antigas aspirações que se tornarão realidade.

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WikiCiências quer ser um instrumento credível

altA WikiCiências, enciclopédia científica portuguesa online, vai ser apresentada na próxima segunda-feira. O site, que faz lembrar o Wikipedia, já tem 250 entradas disponíveis e destina-se “a professores e alunos do básico e do secundário”, diz o comunicado.

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Gravity Probe B confirms Einstein effects

altNasa's Gravity Probe B has produced remarkable new confirmation of some key predictions by Albert Einstein. The satellite's observations show the massive body of the Earth is very subtly warping space and time, and even pulling them around with it. Scientists were able to see these effects by studying the behaviour of four perfectly engineered spinning balls carried inside the probe. The results are published online in the journal Physical Review Letters.

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Neutrons could test Newton's gravity and string theory

altA pioneering technique using subatomic particles known as neutrons could give microscopic hints of extra dimensions or even dark matter, researchers say. The idea rests on probing any minuscule variations in gravity as it acts on slow-moving neutrons in a tiny cavity. A Nature Physics report outlines how neutrons were made to hop from one gravitational quantum state to another. These quantum jumps can test Newton's theory of gravity - and any variations from it - with unprecedented precision.

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