In the past 15 years, metamaterials have brought breakthroughs like invisibility cloaks, acoustic cloaks, miniaturized flat antennas, and you-don’t-have-to-stop-anymore airport security screenings. During Spring term 2015, Sir John Pendry of Imperial College London visited co-founder of the field David R.
In the mid-2000s, Pinar Yoldas spent three years at UCLA pursuing an M.F.A. in design and media arts. While there, her typical trek to campus was an hour-long bike ride from East Hollywood to Westwood along Santa Monica Boulevard.
“Every time I did this, I was literally inhaling the smog,” says Yoldas, a Ph.D. candidate in art, art history, and visual studies at Duke. “I kept thinking about this and ways to protect myself, and being angry at car drivers.”
The "fight or flight" response blamed for some of our modern ills was a great thing, back in the day.
This automatic physiological response to stress pumps the hormone cortisol through your veins, rapidly shutting down your immune system and redirecting resources to your muscles and brain to give you the extra energy to fight or outrun the unseen threat.
It surely enabled our ancestors to hunt their dinners without becoming dinner themselves.
A section of embryonic mouse brain has been stained to show different subtypes of developing neurons. Red marks neurons born early in development and yellow are more recent; cell nuclei are blue. A team led by Debra Silver in Molecular Genetics and Microbiology has found that mice having only one good copy of the gene Rbm8a have fewer neural progenitor cells and thus fewer neurons and are born with smaller brains, demonstrating that Rbmb8a is crucial to healthy brain development.
The combination of an old malaria drug, chloroquine, and an experimental drug, D4476, has been found to interrupt the normal functions of cancer cells, stained blue. David Virshup and Jit Kong Cheong, from Duke-NUS Graduate Medical School in Singapore, wanted to interfere with the cancer cell's known reliance on autophagy, a form of self-destruction. The cells ended up with their surfaces clogged with digestive vacuoles (red), that effectively prevent them from obtaining nutrition.
The colored dots and swirls of "dust" in this tornado-shaped diagram represent thousands of chemical compounds grouped by their physical and chemical similarities in a new technique called "materials cartography," by Stefano Curtarolo, a professor of material sciences and physics and PhD student Corey Oses.
The family tree of birds has been redrawn.
An enormous international scientific effort that compared the whole genomes of 48 bird species has simultaneously published more than two dozen research papers in Science and several other journals.
The new phylogeny shows ostriches, pigeons and chickens close to the origin of modern birds.
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The genomes of modern birds tell a story of how they emerged and evolved after the mass extinction that wiped out dinosaurs and almost everything else 66 million years ago. That story is now coming to light, thanks to an ambitious international collaboration that has been underway for four years.
A biomaterials lab led by Gabriel Lopez has devised a way to grow uniformly sized particles of silicon gel that can be sorted by soundwaves. In a liquid chamber with a standing acoustic wave, most particles will gather at the nodes where the wave is standing still. But the new particles are actually attracted to the antinodes where the highest point of the wave is constantly shifting up and down.