articles

Hydrogen is the most-abundant element in the universe. It's also the simplest--sporting only a single electron in each atom. But that simplicity is deceptive, because there is still so much we have to learn about hydrogen.

One of the biggest unknowns is its transformation under the extreme pressures and temperatures found in the interiors of giant planets, where it is squeezed until it becomes liquid metal, capable of conducting electricity. New work published in Physical Review Letters by Carnegie's Alexander Goncharov and University of Edinburgh's Stewart McWilliams measures the conditions under which hydrogen undergoes this transition in the lab and finds an intermediate state between gas and metal, which they're calling "dark hydrogen."

By the 2080s, as many as 3,331 people could die every year from exposure to heat during the summer months in New York City. The high estimate by Columbia University scientists is based on a new model--the first to account for variability in future population size, greenhouse gas trajectories, and the extent to which residents adapt to heat through interventions like air conditioning and public cooling centers. Results appear online in the journal Environmental Health Perspectives.

El mes pasado, la concentración atmosférica de dióxido de carbono (CO2), medidas en la Isla de Amsterdam, en el sur del Océano Índico, superó por primera vez el valor simbólico de 400 ppm, o 0,04%. Las concentraciones de CO2 registradas en la estación de investigación de la Isla de Amsterdam son los más bajos en el mundo (excluyendo los ciclos estacionales), debido a la lejanía de la isla a partir de fuentes antropogénicas. 

By the 2080s, as many as 3,331 people could die every year from exposure to heat during the summer months in New York City. The high estimate by Columbia University scientists is based on a new model--the first to account for variability in future population size, greenhouse gas trajectories, and the extent to which residents adapt to heat through interventions like air conditioning and public cooling centers. Results appear online in the journal Environmental Health Perspectives.

China tiene la oportunidad de aumentar masivamente su uso de energía eólica…si integra adecuadamente el viento en su sistema de energía existente, de acuerdo con un nuevo estudio. Las investigaciones pronostican que la energía eólica podría proporcionar el 26 por ciento de la demanda eléctrica proyectada de China en 2030, por encima del 3 por ciento del 2015.