Black Hole Billiards in the Centers of Galaxies

Illustration of a swarm of smaller black holes in a gas disk rotating around a giant black hole . Interactions between three black holes, such as those shown in the foreground, occur relatively often and will with high probability result in a merger on a non-circular orbit (credit: J. Samsing/Niels Bohr Institute)

Researchers provide the first plausible explanation to why one of the most massive black hole pairs observed to date by gravitational waves also seemed to merge on a non-circular orbit. Their suggested solution, now published in Nature, involves a chaotic triple drama inside a giant disk of gas around a super massive black hole in a galaxy far, far away.

Black holes are one of the most fascinating objects in the Universe, but our knowledge of them is still limited — especi...

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Treating Tough Tumors by exploiting their Iron ‘Addiction’

A microscopic image of KRAS-driven lung cancer (purple) in a mouse model. Researchers found that KRAS-driven tumors have higher levels of ferrous iron, which correlates with shorter survival times. Image by National Cancer Institute, National Institutes of Health

Researchers at the University of California, San Francisco, have successfully leveraged an FDA-approved drug to halt growth of tumors driven by mutations in the RAS gene, which are famously difficult to treat and account for about 1 in 4 cancer deaths.

Taking advantage of what they discovered to be the cancer cells’ appetite for a reactive form of iron, the researchers tweaked an anticancer drug to operate only in these iron-rich cells, leaving other cells to function normally...

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Shock-Absorbing Material could lead to Stronger, Lighter and Safer Helmets and Vehicles

Johns Hopkins researchers studied energy-absorbing capability of liquid crystal elastomers. Credit: Johns Hopkins University

A team of Johns Hopkins University researchers created shock-absorbing material that protects like a metal, but is lighter, stronger, reusable. The new foam-like material could be a game-changer for helmets, body armor, and automobile and aerospace parts.

“We are excited about our findings on the extreme energy absorption capability of the new material,” said senior author Sung Hoon Kang, an assistant professor of mechanical engineering. “The material offers more protection from a wide range of impacts, but being lighter could reduce fuel consumption and the environmental impact of vehicles while being more comfortable for protective gear wearers.”

Kang, wh...

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Wormholes help Resolve Black Hole Information Paradox

Figure 1: As depicted in science fiction, a wormhole is a shortcut connecting two points in spacetime. A RIKEN physicist and two collaborators have used a new spacetime geometry with a wormhole-like structure to show that information is not necessarily irretrievably lost from black holes as they evaporate. © MARK GARLICK/SCIENCE PHOTO LIBRARY

A RIKEN physicist and two colleagues have found that a wormhole—a bridge connecting distant regions of the Universe—helps to shed light on the mystery of what happens to information about matter consumed by black holes.

Einstein’s theory of general relativity predicts that nothing that falls into a black hole can escape its clutches...

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