This week, Mashable’s reporters and editors have spent hundreds of collective hours tracking down Amazon’s best Prime Day deals. (And we’re not done yet!) We’ve been scouting record-lows on our favorite products, cross-checking prices with competing retailers like Walmart, monitoring deep discounts in case they sell out, and flagging different ways to help our readers shop smart. Along the way, we’ve also been adding some goodies to our carts.
Prime Day 2025: Live updates on the top deals
A common theme: Most of us are stocking up on discounted everyday essentials like skincare, baby supplies, and cat litter. Naturally though, there are a a couple “why not, it’s on sale” impulse buys sprinkled in. After all, headphones prices are insane this Prime Day, and we’re only human.
Below, find the eight products the Mashable team has picked up on Prime Day so far.
1. Some butter yellow headphones
Deputy Shopping and Reviews Editor Miller Kern told me she snagged these “gorgina” Sony headphones “because I wanted some cheap headphones for walks and I’m obsessed with the color.” They’re a low-stakes buy at just $38, which is a new record low.
2. And some Apple AirPods for good measure
Kern also grabbed a pair of Apple AirPods 4, which have fallen to a new all-time low of $89 at Amazon and Walmart. (The ANC and Pro versions are also cheaper than ever, for what it’s worth.) She’ll be giving them to her boyfriend: “He exclusively uses wired Apple earbuds for his runs, but he hates the way they tangle,” she said.
Mashable Trend Report
3. TikTok’s favorite brush for wavy hair
Shopping Reporters Leah Stodart and Bethany Allard both bought the Bounce Curl Define EdgeLift Brush, which people on TikTok endorse for its ability to bring out curls in naturally wavy hair. Mashable Contributor Christina Buff also has it in her cart. I can’t help but wonder… Should I be buying a Bounce Curl Define EdgeLift Brush? (This is its lowest price to date, by the way.)
4. A three-pack of mascara remover
This one was another no-brainer for Allard. Her favorite waterproof mascara remover “usually runs me like $12-14 for one [tube],” she said, “so this [three-pack] is a steeeeaaal” at $25-ish. “My most stubborn waterproof mascara hates to see me pull out this blue tube,” she shared. It appears to be on sale for the first time ever.
5. Some fancy moisturizer
Stodart has been using this moisturizer on and off since 2021. “I was struggling with weird little rough red patches all over my face and heard that it was super gentle and good for compromised skin barriers,” she said. “It was literally the only product that didn’t burn my skin for a while.” A 3.4-ounce bottle is $51 on the Stratia website, but 20% off on Amazon during Prime Day. It’s never gone on sale there before.
6. A huge bundle of diapers and baby wipes
Having covered Prime Day for nine years now, Special Projects Editor Nicole Cammorata is a pro at scoping sales. She found these Pampers diapers and baby wipes listed individually at other stores to verify that Amazon’s bundle “really is a good deal.” Indeed, it’s never been cheaper before this week.
7. Ten pounds of natural kitty litter
Per Stodart, who owns two cats, you can’t go wrong with a $10 ten-pound bag of “classic CCL (corn cob litter).” It gets a few cents cheaper if you sign up for recurring deliveries, too.
8. A gigantic Yankee candle
Kern restocked her favorite Yankee Candle in the scent Pink Sands. “It’s like very fresh and clean smelling, but also slightly fruity,” she told me. It’s one of nearly two dozen 22-ounce Yankee candles that are deeply discounted for Prime Day.
Best Curated Amazon Prime Day Deals
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![Scientists Say Some Black Holes Are Born From Other Black Holes
Since LIGO’s Nobel-winning discovery of gravitational waves—ripples in spacetime—the U.S.-based detector has been picking up on hundreds of signals from black hole mergers. And, after a decade of studying gravitational waves, researchers believe a significant fraction of black holes may come from cosmic chain reactions. A recent paper published in Physical Review Letters describes an analysis of 155 pairs of binary black holes, identified by LIGO and its sisters, Virgo and KAGRA, in Italy and Japan, respectively. According to the study, about 14% of merging black holes may be what’s called “second-generation black holes,” or black holes that form from previous mergers of two smaller black holes. This “hierarchical” backstory is vastly different from the textbook version of how black holes emerge from the explosive death of a star. “Overall in the universe, black holes are merging all the time,” Cailin Plunkett, the study’s first author and a graduate student at the Massachusetts Institute of Technology, told MIT News. “Now we’re seeing a relatively consistent picture where there’s a decent percentage of black holes that are coming from this repeated pathway.”
Tracking the invisible Gravitational waves that reach Earth’s detectors typically come from extremely intense events. Over the years, LIGO has picked up some truly perplexing signals. For example, last summer it found the most colossal black hole merger ever—and if that wasn’t wild enough, the black holes that took part in the merger lie within a cosmic “dead zone” for black holes.
This zone refers to a range of black hole masses in which, physically speaking, black holes can’t form through ordinary stellar collapse. From these discoveries, astronomers realized just how little we knew about black holes, which are challenging to investigate directly. In that sense, it was a no-brainer that the ever-growing catalog of LIGO’s gravitational signals would turn up entirely new insights about black holes. “It is increasingly clear, both from individual events and population analyses, that massive black holes exist in [this] range,” the researchers wrote in the latest paper. “These observations have spurred further investigation into mechanisms that can populate this gap.”
A wobbly imprint The latest research represents one such investigation. During mergers, the two black holes spiral toward each other along an orbital plane. When one or both black hole spins are misaligned, the orbital plane can wobble, or “precess,” the researchers explained to MIT News. The degree to which the disk wobbles acts as a parameter from which researchers can measure the masses and spins of the merging black holes. One telling sign of hierarchical mergers is that they’re “lopsided,” meaning one of the pair has a much higher spin and mass than the other. For the study, the team created an analytic model to capture the kind of wobble that would have emerged from second-generation black holes. Around 14% of merging black holes followed this pattern, and the second-generation black holes identified had a very specific range of masses, at around 20 solar masses or 40 solar masses and above. Of mysterious origins To be fair, that might not sound like a whole lot. But it demonstrates that a sizeable portion of known black holes indeed follow this pattern. As for why, the team suspects hierarchical mergers emerge from dense stellar environments. Simply, when multiple neighboring stars die and collapse into black holes, the dense environment can make it easier for those black holes to find each other and merge. That could further lead to the formation of second-generation black holes. Theoretically, this could “repeat potentially ad infinitum, by virtue of the fact that you have a ton of stars and black holes in this really dense environment,” Plunkett said.
But an ensuing mystery concerns those black holes in the 40-and-above regime, which coincides with the aforementioned “death zones” for black hole masses. According to stellar evolution theory, black holes born of supernovas shouldn’t leave any black holes above roughly 45 solar masses, explained Plunkett. “Yet we have seen black holes that are that massive,” she mused. “And the question is: Where did they come from?” For now, it’s hard to say when we’ll get an answer to that question, if ever. But one thing seems to be clear: black holes are a lot weirder than we could ever imagine. #Scientists #Black #Holes #Born #Black #HolesBlack holes,Gravitational wave,LIGO Scientists Say Some Black Holes Are Born From Other Black Holes
Since LIGO’s Nobel-winning discovery of gravitational waves—ripples in spacetime—the U.S.-based detector has been picking up on hundreds of signals from black hole mergers. And, after a decade of studying gravitational waves, researchers believe a significant fraction of black holes may come from cosmic chain reactions. A recent paper published in Physical Review Letters describes an analysis of 155 pairs of binary black holes, identified by LIGO and its sisters, Virgo and KAGRA, in Italy and Japan, respectively. According to the study, about 14% of merging black holes may be what’s called “second-generation black holes,” or black holes that form from previous mergers of two smaller black holes. This “hierarchical” backstory is vastly different from the textbook version of how black holes emerge from the explosive death of a star. “Overall in the universe, black holes are merging all the time,” Cailin Plunkett, the study’s first author and a graduate student at the Massachusetts Institute of Technology, told MIT News. “Now we’re seeing a relatively consistent picture where there’s a decent percentage of black holes that are coming from this repeated pathway.”
Tracking the invisible Gravitational waves that reach Earth’s detectors typically come from extremely intense events. Over the years, LIGO has picked up some truly perplexing signals. For example, last summer it found the most colossal black hole merger ever—and if that wasn’t wild enough, the black holes that took part in the merger lie within a cosmic “dead zone” for black holes.
This zone refers to a range of black hole masses in which, physically speaking, black holes can’t form through ordinary stellar collapse. From these discoveries, astronomers realized just how little we knew about black holes, which are challenging to investigate directly. In that sense, it was a no-brainer that the ever-growing catalog of LIGO’s gravitational signals would turn up entirely new insights about black holes. “It is increasingly clear, both from individual events and population analyses, that massive black holes exist in [this] range,” the researchers wrote in the latest paper. “These observations have spurred further investigation into mechanisms that can populate this gap.”
A wobbly imprint The latest research represents one such investigation. During mergers, the two black holes spiral toward each other along an orbital plane. When one or both black hole spins are misaligned, the orbital plane can wobble, or “precess,” the researchers explained to MIT News. The degree to which the disk wobbles acts as a parameter from which researchers can measure the masses and spins of the merging black holes. One telling sign of hierarchical mergers is that they’re “lopsided,” meaning one of the pair has a much higher spin and mass than the other. For the study, the team created an analytic model to capture the kind of wobble that would have emerged from second-generation black holes. Around 14% of merging black holes followed this pattern, and the second-generation black holes identified had a very specific range of masses, at around 20 solar masses or 40 solar masses and above. Of mysterious origins To be fair, that might not sound like a whole lot. But it demonstrates that a sizeable portion of known black holes indeed follow this pattern. As for why, the team suspects hierarchical mergers emerge from dense stellar environments. Simply, when multiple neighboring stars die and collapse into black holes, the dense environment can make it easier for those black holes to find each other and merge. That could further lead to the formation of second-generation black holes. Theoretically, this could “repeat potentially ad infinitum, by virtue of the fact that you have a ton of stars and black holes in this really dense environment,” Plunkett said.
But an ensuing mystery concerns those black holes in the 40-and-above regime, which coincides with the aforementioned “death zones” for black hole masses. According to stellar evolution theory, black holes born of supernovas shouldn’t leave any black holes above roughly 45 solar masses, explained Plunkett. “Yet we have seen black holes that are that massive,” she mused. “And the question is: Where did they come from?” For now, it’s hard to say when we’ll get an answer to that question, if ever. But one thing seems to be clear: black holes are a lot weirder than we could ever imagine. #Scientists #Black #Holes #Born #Black #HolesBlack holes,Gravitational wave,LIGO](https://gizmodo.com/app/uploads/2026/07/black-hole-hierarchial-mergers-1280x853.jpg)
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