29/01/2013

Low density of Earth's core due to oxygen and silicon impurities

During accretion and differentiation of the Earth, chemical interactions in a silicate magma ocean and liquid iron drove silicon and oxygen impurities into what went on to become the liquid outer core. Contrasting with previous ...

Curiosity maneuver prepares for drilling

(Phys.org)—NASA's Mars rover Curiosity has placed its drill onto a series of four locations on a Martian rock and pressed down on it with the rover's arm, in preparation for using the drill in coming days.

Omega-3 can help laying hens avoid bone damage

Most of us are aware of the potential health benefits of omega-3 found in fish oil and flax seed. Now researchers have found that omega-3 could help laying hens avoid bone damage, which affects millions of hens each year, ...

Endangered kangaroo prefers 'the girl next door'

(Phys.org)—A group of leading conservation scientists from The University of Queensland (UQ) and James Cook University (JCU) has exposed the private life of a small, endangered kangaroo.

Flies of the world embrace vegetarianism

(Phys.org)—Microbe-eating flies from at least three different locations around the world recently have evolved into herbivores, feeding on some of the most toxic plants on Earth. Fly detectives and UA evolutionary biologists ...

3Qs: Gender equality in the military

The Pen­tagon has lifted the military's offi­cial ban on women in combat, a his­toric deci­sion that Pres­i­dent Obama said reflected "the coura­geous and patri­otic ser­vice of women through more than two cen­turies ...

New study strengthens olfactory vibration-sensing theory

(Phys.org)—A new study by a team of chemists in Greece has added credence to a theory that suggests that humans differentiate smells by sensing molecular vibrations, rather than through simple binding to receptors. In their ...

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