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Los desiertos de alimentos, esas grandes extensiones de zonas urbanas y rurales vacíos de fruta fresca y verduras, son una epidemia que va en aumento y que afecta a más de 23,5 millones de personas a nivel nacional en los EEUU. Afectan desproporcionadamente a los ocupantes pobres de los barrios de bajos ingresos, los desiertos de alimentos son el resultado de la falta de acceso a una alimentación saludable.

Las baterías de uso industrial, conocidas como baterías de flujo, podrían un día poner en orden el uso generalizado de la energía renovable, pero sólo si los dispositivos pueden almacenar grandes cantidades de energía barata y alimentar la red cuando el sol no está brillando y los vientos están en calma. Eso es algo que las baterías de flujo convencionales no pueden hacer. Ahora, los investigadores informan que han creado un nuevo tipo de batería de flujo que utiliza la tecnología de iones de litio, el tipo usado para dispositivos portátiles...

Watching a lot of TV and having a low physical activity level as a young adult were associated with worse cognitive function 25 years later in midlife, according to an article published online by JAMA Psychiatry.

Few studies have investigated the association between physical activity in early adulthood and cognitive function later in life. Coupled with the increasing prevalence of sedentary or screen-based activities, such as watching television, these trends are of concern for upcoming generations of young people.

What is the climate waiting for Russia and Europe in 15-20 years? Will be there weather abnormalities in the coming decades? Will some areas experience more severe winter, while the others will have hot summer? It all depends on how much the climate will be affected by the dynamics of the possible onset of minimum solar magnetic activity. The Sun's behaviour in future cycles is the main theme of a publication on the forecast and explanation of the minima of solar activity. The paper was prepared with contributions from Elena Popova from the Skobeltsyn Institute of Nuclear Physics (Lomonosov Moscow State University) and was published in Scientific Reports.

Scientists have studied the evolution of the solar magnetic field and the number of sunspots on the Sun's surface. The amplitude and the spatial configuration of the magnetic field of our star are changing over the years. Every 11 years the number of sunspots decreases sharply. Every 90 years this reduction (when it coincides with the 11-year cycle) reduces the number of spots by about a half. A 300-400 year lows reduce their numbers almost to zero. Best known minimum is the Maunder minimum, which lasted roughly from 1645 to 1715. During this period, there were about 50 sunspots instead of the usual 40,000-50,000.

It's not just Indonesia's forests and peatlands that are burning - the Amazon is suffering almost as badly, with over 18,000 fires last month in Brazil alone, write Jos Barlow & Erika Berenguer. The future is looking hot and fiery.