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Monday, January 22, 2018

How natural selection acted on one penguin species over the past quarter century

Biologists combed through 28 years' worth of data on Magellanic penguins to search for signs that natural selection -- one of the main drivers of evolution -- may be acting on certain penguin traits.

In bird feathers, scientists find hints about color of extinct animals

In order to discover the true colors of ancient animals, scientists are using X-rays to closely examine the chemical details of modern bird feathers. The researchers were able to map elements that make up pigments responsible for red and black colors in feathers. They hope to use this information to find traces of the same pigments in fossil specimens of extinct animals, such as dinosaurs. This latest discovery means that scientists may be able to go beyond monochrome in their depictions of fossilized creatures, and make steps towards portraying their colors more accurately.

Ice Man, Ötzi: A treacherous murder with links to Central Italy

The copper used to make Ötzi's axe blade did not come from the Alpine region as had previously been supposed, but from ore mined in southern Tuscany. Ötzi was probably not involved in working the metal himself, as the high levels of arsenic and copper found in his hair had, until now, led us to assume. His murder over 5,000 years ago seems to have been brought about due to a personal conflict a few days before his demise, and the man from the ice, despite his normal weight and active life-style, suffered from extensive vascular calcification.

Greenland rising as ice melts

A new study on the Greenland Ice Sheet provides valuable insight on climate change, using unique research methods to establish new estimates of ice loss for both modern and ancient times, says geologists.

Melatonin, biological clock keep singing fish on time

In the 1980s, people living on houseboats in the San Francisco Bay were puzzled by a droning hum of unknown origin that started abruptly in the late evening and stopped suddenly in the morning. A lengthy investigation revealed the culprit: male plainfin midshipman fish (Porichthys notatus) that sing at night to attract mates. The fish, which can grow to 15 inches in length, live along the Pacific coast from Alaska to Baja, California.

Stronger turbine blades with molybdenum silicides

Molybdenum silicides can improve the efficiency of turbine blades in ultrahigh-temperature combustion systems, researchers have discovered.

Oxygen levels were key to early animal evolution, strongest evidence now shows

It has long puzzled scientists why, after 3 billion years of nothing more complex than algae, complex animals suddenly started to appear on Earth. Now, a team of researchers has put forward some of the strongest evidence yet to support the hypothesis that high levels of oxygen in the oceans were crucial for the emergence of skeletal animals 550 million years ago.

To produce biopharmaceuticals on demand, just add water

Researchers have created tiny freeze-dried pellets that include all of the molecular machinery needed to translate DNA into proteins, which could form the basis for on-demand production of drugs and vaccines.

Landmark map reveals the genetic wiring of cellular life

A new map breaks away from the old way of studying genes one at a time, showing how genes interact in groups to shed light on the genetic roots of diseases.

Apple, lettuce can remedy garlic breath

Garlic -- consumers either love or hate the taste, but one thing is for certain, no one likes it when the scent of it sticks around on their breath. Now, garlic lovers may have a new solution to their halitosis problem. A study has found that eating raw apple or lettuce may help reduce garlic breath.

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Gobierno de EE.UU. sigue cerrado: el lunes habrá otra votación

La votación clave sobre el avance del proyecto se llevará a cabo al mediodía del lunes. El gobierno ya lleva en cierre dos días. | MÁS: Todo lo que hay que saber sobre el cierre del gobierno de EE.UU.Trump invocó la "opción nuclear" Fuente: Cnnenespanol.com

Report: Sydney train hits barrier, leaves 15 people injured

Train operator says they're aware of the incident Monday and that the train had ran into a buffer at Richmond Station

Tom Brady y los New England Patriots van al Super Bowl LII

Los New England Patriots vencieron este domingo, en el partido por el campeonato de la Conferencia Americana, a los Jacksonville Jaguars con marcador de 24-20 y jugarán el Super Bowl LII.  Fuente: Cnnenespanol.com