Zientzia hedabideetan

Un poco de cianuro de hidrógeno, sulfuro de hidrógeno y la radiación ultravioleta del Sol. La receta de la vida en la Tierra podría ser tan simple como eso, según un nuevo y elegante trabajo.

Here’s a new way to search for life on alien worlds: Look for the light it reflects into space. To prepare for such a search, scientists have made a library of life’s colors, cataloging the spectra, or wavelengths of light, reflected by 137 types of microorganisms.

La invención de las técnicas de imágenes de resonancia magnética funcional en los años 80 revolucionaron el conocimiento de lo que ocurre dentro de la cabeza. El primer estudio con escaneo cerebral de asesinos fue realizado en California por el neurocientífico británico Adrian Raine. Raine había llegado hasta allí atraído no por sus playas sino,…

Azken urteotan, sarri entzun izan ditugu zenbait infekzioren izen bereziak; entzun izan dugu, halaber, mehatxu bat direla infekzio horiek, hala nola hegazti-gripea, Ebola birusa, SARS edo MERS koronabirusak eta abar luze bat. Baina, zergatik dira mehatxu XXI. mende honetan?

In its final weeks, the MESSENGER mission reveals fresh details about the planet’s scorched surface.

The young man was there because just three years earlier he had had his penis amputated in order to save his life after a local circumcision had gone badly wrong. The surgery he underwent in December was declared a success just four months later: he was the recipient of the first-ever penile transplant to result in full functionality.

Small satellites are becoming increasingly popular tools for Earth-imaging, communications, and other applications. But they have major control issues: Once in space, they can’t accurately point cameras or change orbit, and they usually crash and burn within a few months. MIT spinout’s electric-propulsion system improves maneuverability of small satellites.

“Eta argiak, benetan, denbora bat beharko balu Jupiterretik hona iristeko?” pentsatu zuten.  Cassini eta Rømer azalpen baten bila zebiltzan; ezin baitzuten ulertu zergatik Ioren eklipseak batzuetan espero baino lehenago gertatzen ziren, eta besteetan beranduago. Eta argiaren kontu horrek azal zezakeen. Baina orduan, argiak abiadura finitua zuen, azkenean? Cassinik baztertu egin zuen ideia hura. Rømerrek berriz,…

An asteroid smashing into a planet can dramatically alter the planet’s habitability by setting back evolution or even encouraging biodiversity. In order to understand how cosmic impacts influence life and the environment, scientists study the craters left behind. Some of these impact craters come in pairs, most likely caused by binary asteroids. A binary asteroid…