Is there a connection between what children believe and how they act, and how strong is the link? Researchers from four universities who studied these questions were surprised by the results.

"For me the biggest surprise was how the link between beliefs and behaviors changed from kindergarten to later in childhood and adolescence," said Jennifer Lansford, one of the researchers from Duke University's Center for Child and Family Policy. "Often we assume that if someone believes something, they will act in a way consistent with those beliefs, but that wasn't necessarily the case for the kindergarteners in our sample."

The means by which proteins provide a 'border control' service, allowing cells to take up chemicals and substances from their surroundings, whilst keeping others out, is revealed in unprecedented molecular detail for the first time in Science Express.

The scientists behind the new study have visualised the structure of a protein called Microbacterium hydantoin permease, or 'Mhp1', which lives in the oily membrane that surrounds bacteria cells. It belongs to a group of proteins known as 'transporters' which help cells take up certain substances from the environment around them. This is the first time scientists have been able to show how a transporter protein opens and closes to allow molecules across the membrane and into the cell, by accurate analysis of its molecular structure in different states.

Nothing drives biologists crazier than people who think the colloquial meaning of 'junk' means junk DNA is valueless. For about 15 years, scientists have known that certain junk DNA, repetitive DNA segments previously thought to have no function, could evolve into exons, which are the building blocks for protein-coding genes in higher organisms like animals and plants.

A new University of Iowa study has found evidence that a significant number of exons created from junk DNA seem to play a role in gene regulation. The findings increase our understanding of how humans differ from other animals, including non-human primates.

Lightning and gases from volcanic eruptions could have given rise to the first life on Earth, according to a new analysis of samples from a classic origin-of-life experiment by NASA and university researchers. The NASA-funded result is the subject of a paper in Science appearing October 16.

"Historically, you don't get many experiments that might be more famous than these; they re-defined our thoughts on the origin of life and showed unequivocally that the fundamental building blocks of life could be derived from natural processes," said lead author Adam Johnson, a graduate student with the NASA Astrobiology Institute team at Indiana University, Bloomington, Ind.

From 1953 to 1954, Professor Stanley Miller, then at the University of Chicago, performed a series of experiments with a system of closed flasks containing water and a gas of simple molecules. At the time, the molecules used in the experiment (hydrogen, methane, and ammonia) were thought to be common in Earth's ancient atmosphere.

Using brain imaging and chocolate milkshakes, scientists have found that women with weakened "reward circuitry" in their brains are at increased risk of weight gain over time and potential obesity. The risk increases even more for women who also have a gene associated with compromised dopamine signaling in the brain.

The results, drawn from two studies using functional magnetic resonance imaging (fMRI) at the University of Oregon's Lewis Center for Neuroimaging, appear in the Oct. 17 issue of the journal Science. The first-of-its-kind approach unveiled blunted activation in the brain's dorsal stratium when subjects were given milkshakes, which may reflect less-than-normal dopamine output.

Sunlight contains the entire spectrum of colors that can be seen with the naked eye -- all the colors of the rainbow. What our eyes interpret as color are really different energy levels, or frequencies of light. Today's solar cell materials can only capture a small range of frequencies, so they can only capture a small fraction of the energy contained in sunlight.

Researchers have created a new material that overcomes two of the major obstacles to solar power: it absorbs all the energy contained in sunlight, and generates electrons in a way that makes them easier to capture.

Ohio State University chemists and their colleagues combined electrically conductive plastic with metals including molybdenum and titanium to create the hybrid material.