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Los osos negros americanos pueden ser capaces de reconocer las cosas que conocen en la vida real, tales como comida o los seres humanos…cuando ven una fotografía de la misma cosa. Esta es una de las conclusiones de un estudio dirigido por Zoe Johnson-Ulrich y Jennifer Vonk de la Universidad de Oakland en los EE.UU., que involucró a un oso negro llamado Migwan y una pantalla de ordenador

Las marismas de Florida son un desierto pantanoso del tamaño de Delaware. En algunos lugares a lo largo de la carretera en el sur de la Florida, parecen hierba alta de la sierra en el horizonte, una pradera salpicada con algunos cipreses retorcidos. El cielo es de un azul muy claro.

Los incendios subterráneos están presentes desde hace más de un siglo por debajo de la cuenca carbonífera más grande de la India, pero en las últimas décadas la minería a cielo abierto ha traído las llamas a la superficie con consecuencias devastadoras para la población local.

An international research team has calculated the costs and benefits of calcification for phytoplankton and the impact of climate change on their important role in the world's oceans.

Single-celled phytoplankton play an important role in marine biogeochemical cycling, in marine food webs and in the global climate system. Coccolithophores are a particular group that cover themselves with calcium carbonate shields, known as coccoliths. Some wrap themselves in an impenetrable coat of coccoliths, some make coccoliths in the form of sharp spikes, some use them as parasols against the sun and some form funnel-shaped light collectors.

But this requires a lot of energy -- and the price for the artful armour could rise further due to global change. With the help of a new model, the researchers analysed the energetic costs and benefits of calcification. The results, published in the current issue of the journal Science Advances, suggest that the ecological niche for calcifying algae will become narrower in the future.

A new study has found for the first time that ocean warming is the primary cause of retreat of glaciers on the Antarctic Peninsula. The Peninsula is one of the largest current contributors to sea-level rise and this new finding will enable researchers to make better predictions of ice loss from this region.

The research, by scientists at Swansea University and British Antarctic Survey, is published in the journal Science this week (15 July). The study reports that glaciers flowing to the coast on the western side of the Peninsula show a distinct spatial correlation with ocean temperature patterns, with those in the south retreating rapidly but those in the north showing little change. Some 90% of the 674 glaciers in this region have retreated since records began in the 1940s.