Selasa, 04 Agustus 2015

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Our elegant brain: Motor learning in the fast lane

Posted: 03 Aug 2015 12:55 PM PDT

To learn new motor skills, neurons within the cerebellum engage in elegant, virtually mathematical, computations to quickly compare expected and actual sensory feedback. They then quickly readjust, changing the strength of connections between other neurons to form new patterns in the brain in order to accomplish the task at hand, researchers report.

Lab experiment mimics early-stage planetary formation process

Posted: 03 Aug 2015 12:55 PM PDT

Physicists have directly observed, for the first time, how highly charged dust-sized particles attract and capture others to build up clusters particle by particle. This process can lead to the formation of "granular molecules" whose configurations resemble those of simple chemical molecules.

Body size increase did not play a role in the origins of homo genus, new analysis suggests

Posted: 03 Aug 2015 12:53 PM PDT

A new analysis of early hominin body size evolution suggests that the earliest members of the Homo genus (which includes our species, Homo sapiens) may not have been larger than earlier hominin species.

What would the world look like to someone with a bionic eye?

Posted: 03 Aug 2015 12:52 PM PDT

While major advancements have been made in vision recovery technologies, the vision provided by those devices might be very different from what scientists and patients have assumed.

Shifting winds, ocean currents doubled endangered Galápagos penguin population

Posted: 03 Aug 2015 12:51 PM PDT

Shifting winds, ocean currents doubled endangered Galápagos penguin population, new research shows. The Galápagos Islands, a chain of islands 1,000 kilometers (600 miles) west of mainland Ecuador, are home to the only penguins in the Northern Hemisphere. The 48-centimeter (19-inch) tall black and white Galápagos penguins landed on the endangered species list in 2000 after the population plummeted to only a few hundred individuals and are now considered the rarest penguins in the world.

Cassiopeia's hidden gem: The closest rocky, transiting planet

Posted: 03 Aug 2015 12:51 PM PDT

A star in the constellation Cassiopeia has a planet in a three-day orbit that transits, or crosses in front of its star. At a distance of just 21 light-years, it is by far the closest transiting planet to Earth, which makes it ideal for follow-up studies. Moreover, it is the nearest rocky planet confirmed outside our solar system.

Small tilt in magnets makes them viable memory chips

Posted: 03 Aug 2015 12:50 PM PDT

Engineers have found a new way to switch the polarization of nanomagnets without the need for an external magnetic field. The advance brings the semiconductor industry a major step closer to moving high-density storage from hard disks onto integrated circuits, and could soon lead to instant-on computers that operate with far greater speed and use significantly less power.

Earliest evidence of reproduction in a complex organism

Posted: 03 Aug 2015 12:48 PM PDT

A new study of 565 million-year-old fossils has identified how some of the first complex organisms on Earth -- possibly some of the first animals to exist -- reproduced, revealing the origins of our modern marine environment.

Four million years at Africa's salad bar

Posted: 03 Aug 2015 12:48 PM PDT

As grasses grew more common in Africa, most major mammal groups tried grazing on them at times during the past 4 million years, but some of the animals went extinct or switched back to browsing on trees and shrubs, according to a new study.

Quantum behavior of millimeter-sized magnets unraveled: Superconducting qubit and magnetic sphere hybrid

Posted: 03 Aug 2015 07:51 AM PDT

Researchers have demonstrated that it is possible to exchange a quantum bit, the minimum unit of information used by quantum computers, between a superconducting quantum-bit circuit and a quantum in a magnet called a magnon. This result is expected to contribute to the development of quantum interfaces and quantum repeaters.

Even moderate picky eating can have negative effects on children's health

Posted: 03 Aug 2015 05:33 AM PDT

Picky eating among children is a common but burdensome problem that can result in poor nutrition for kids, family conflict, and frustrated parents. Although many families see picky eating as a phase, a new study finds moderate and severe picky eating often coincides with serious childhood issues such as depression and anxiety that may need intervention.
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