Scientists say they know how the universe will end. It won’t be a cosmic collapse but rather a giant cosmic bubble that devours everything in its path. According to a recent paper, published on March 12 in the journal Physical Review D, the final moment for the universe will be triggered by a bizarre consequence of subatomic physics called an instanton. This instanton will create a tiny bubble that will expand at the speed of light, swallowing everything in its path. It’s only a matter of time. “At some point you will create one of these bubbles,” study lead author … Read more
A team of chemists has created a substance that can change its color and stiffness, which they’re comparing to chameleon skin. The stretchy material is made up of strands of copolymers — complex, self-assembling large molecules that in this case are shaped like long dumbbells, with spherical bulges on each end. The way those copolymers react to mechanical stress allows them to vary their stiffness and color, the researchers wrote in a paper published Friday (March 30) in the journal Science. Like a chameleon, the substance doesn’t undergo any chemical changes when it changes color. Instead, those tiny bulges at … Read more
With all that’s known about human anatomy, you wouldn’t expect doctors to discover a new body part in this day and age. But now, researchers say they’ve done just that: They’ve found a network of fluid-filled spaces in tissue that hadn’t been seen before. These fluid-filled spaces were discovered in connective tissues all over the body, including below the skin’s surface; lining the digestive tract, lungs and urinary systems; and surrounding muscles, according to a new study detailing the findings, published today (March 27) in the journal Scientific Reports. Previously, researchers had thought these tissue layers were a dense “wall” … Read more
Twins often feel like they have a special connection, but for one California woman, the connection is particularly visceral — she is her own twin. The woman, singer Taylor Muhl, has a condition called chimerism, meaning she has two sets of DNA, each with the genetic code to make a separate person. The rare condition can happen during fetal development; in Muhl’s case, she had a fraternal twin that she absorbed in the womb, she told People magazine. The condition explains why Muhl has what appears to be a large birthmark on her torso. One side has a different skin … Read more
Light moves fast. That’s kind of the whole point of light, at least the way most people think about it. Light shoots through the 93 million miles between Earth and the sun in just 8 minutes, it carries information all around the world nearly instantly, and its top speed of 186,000 miles per second (300,000 kilometers/s) turns out to be the absolute speed limit of the entire universe. But there are some physicists interested in turning that trait of light on its head, and slowing it way down. And in a new paper, published Jan. 3 in the journal Physical … Read more
You’ve got an ancient virus in your brain. In fact, you’ve got an ancient virus at the very root of your conscious thought. According to two papers published in the journal Cell in January, long ago, a virus bound its genetic code to the genome of four-limbed animals. That snippet of code is still very much alive in humans’ brains today, where it does the very viral task of packaging up genetic information and sending it from nerve cells to their neighbors in little capsules that look a whole lot like viruses themselves. And these little packages of information might … Read more
Alien-life hunters should keep an open mind when scanning the atmospheres of exoplanets, a new study stresses. The time-honored strategy of looking for oxygen is indeed a good one, study team members said; after all, it’s tough for this gas to build up in a planet’s atmosphere if life isn’t there churning it out. “But we don’t want to put all our eggs in one basket,” study lead author Joshua Krissansen-Totton, a doctoral student in Earth and space sciences at the University of Washington in Seattle, said in a statement. “Even if life is common in the cosmos, we have … Read more
A little plot bunny offered with love to all our sci fi writers: A new “tractor beam” can levitate large objects in midair, using only sound. So far, researchers have floated spheres as large as 0.6 inches (16 millimeters) in diameter and moved orbs as large as 0.8 inches (2 cm) on a tabletop using tornadoes of sound waves. Theoretically, vortices made by an array of 200 speakers by 200 speakers could hold up objects as large as 31 inches (80 cm) in diameter. “This is new to acoustics,” said study co-author Mihai Caleap, a senior research associate in engineering … Read more
Two separate teams of scientists have built the thinnest mirrors in the world: sheets of molybdenum diselenide (MoSe2), each just a single atom wide. The mirrors were developed at the same time at Harvard University and the Institute for Quantum Electronics in Zurich, and described in a pair of papers published Thursday (Jan. 18) in the journal Physical Review Letters. These engineering feats push the limits of what’s possible in this physical universe, the researchers said. Despite approaching the minimum thickness an object could possibly have and remain reflective under the laws of physics, the tiny mirrors reflected a great … Read more
I love historical fiction; however, I’ve encountered the occasional work in which it’s clear the author hasn’t done sufficient research before writing. Anachronisms are the biggest culprit in this regard, so today I thought I’d share four tips on conducting research for your historical novel.