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Slashdot reader sciencehabit shares this excerpt from a new article in Science magazine: At first, astronomers knew of only one cosmic scenario that fit the bill for the violent formation of "jewelry shop" elements [gold and sliver]: the collision of two ultra-dense stellar corpses called neutron stars. Now, a second has stepped onto the scene. As they report this week in The Astrophysical Journal Letters, researchers have discovered signatures of this heavy element formation — called the r-process — in a giant flare first detected from a highly magnetic neutron star in 2004. The flare, which released more energy than our Sun does in a million years as it spewed electrically charged material, has remained shrouded in mystery since its discovery 20 years ago. Researchers quickly traced the outburst to a nearby magnetar, a special breed of neutron star whose magnetic fields are trillions times stronger than Earth's. But ten minutes after the massive flare, a second, fainter signal inexplicably came from the same star. More r-process sources may still be looming in the dark. The new study accounts for about 10% of the Milky Way's heavy elements, suggesting that astronomers will have to scour the cosmos for even more places where the r-process is hiding. One potential spot is a rare type of supernova that births rapidly rotating neutron stars, says says Anirudh Patel, the new study's lead author and an astronomer at Columbia University. He hopes that with more observations, astronomers will be able to sharpen that picture.... "It's humbling to realize that these were made in such extreme astrophysical environments."

Remember when U.S. National Security Adviser Mike Waltz mistakenly included a journalist in an encrypted chatroom to discuss looming U.S. military action against Yemen's Houthis? A recent photo of a high-level cabinet meeting caught Waltz using a "less-secure Signal app knockoff," reports the Guardian: The chat app Waltz was using appears to be a modified version of Signal called TM SGNL, made by a company that copies messaging apps but adds an ability to retain messages and archive them. The White House officials may be using the modified Signal in order to comply with the legal requirement that presidential records be preserved... That function suggests the end-to-end encryption that makes Signal trusted for sharing private communications is possibly "not maintained, because the messages can be later retrieved after being stored somewhere else", according to 404 Media. Thursday the national security adviser was removed from his position, the article points out. He was instead named America's ambassador to the United Nations.