Digital Phablet

Tag: asteroid

  • Asteroid Impact Sparked Global Firestorm, Study Reveals

    Asteroid Impact Sparked Global Firestorm, Study Reveals

    A recent study suggests that the asteroid impact responsible for the dinosaurs’ extinction may have been even more catastrophic than previously believed. Researchers now propose that a massive cloud of dust resulting from the impact trapped heat in Earth’s atmosphere, leading to temperatures high enough to ignite wildfires globally and cause extensive animal fatalities within just a few hours.

    Approximately 66 million years ago, a colossal asteroid roughly 10 kilometers (6 miles) across struck the Yucatán Peninsula in present-day Mexico, forming the Chicxulub crater. This impact marked the end of the dinosaurs and wiped out around 75% of all Earth’s species. While the link between the impact and the mass extinction has been widely accepted, scientists have debated how exactly this devastation unfolded.

    The latest research, published in the Journal of Geophysical Research: Biogeosciences, highlights an intense heat wave that might have swept across the planet immediately following the collision. The force of the impact vaporized vast amounts of rock, which cooled rapidly into tiny glass-like particles called spherules. These particles were lofted high into the atmosphere and then rained back down, generating intense frictional heat as they re-entered Earth’s atmosphere.

    Previous studies indicated that these falling spherules could have caused surface fires by burning exposed animals but lacked evidence of widespread forest fires. However, lead author Brandon Johnson, a planetary scientist at Purdue University, was intrigued by the discovery of a 2023 study revealing a thin layer of fine dust left by the impact.

    Johnson’s team combined computer models with geological data to estimate the amount of dust remaining in the atmosphere. Their findings suggest that this dust created a vast insulating blanket, trapping heat from the falling spherules and amplifying surface temperatures. Their calculations show that this process could have made surface heating approximately 3.5 times more intense than previous estimates. Such extreme heat could have ignited forests globally and killed large animals with thick skin, with many terrestrial creatures dying within the first couple of hours after impact.

    Interestingly, the dust responsible for initially trapping heat could have later contributed to cooling the planet. As the fiery debris settled and fires subsided, the dense dust cloud likely blocked sunlight for years or even decades, resulting in a prolonged “impact winter.” This period of darkness would have hindered plant growth and left surviving animals starving.

    Not all scientists agree that widespread wildfires occurred globally. Evidence for large-scale wildfires is primarily found in North America, with ongoing investigations into whether similar signs exist elsewhere. More geological research is needed to determine whether intense fires or the extended cold caused the greatest damage during this mass extinction event.

    Research also aims to better understand which animals managed to survive and why. Insights into why some species persisted while dinosaurs vanished may shed light on how life rebounded after one of Earth’s greatest natural catastrophes.

  • Ancient 3-Billion-Year-Old Asteroid Crater Reveals Earth’s Turbulent Past

    Ancient 3-Billion-Year-Old Asteroid Crater Reveals Earth’s Turbulent Past

    Scientists have verified the age of the oldest known asteroid impact crater on Earth, revealing that a massive space debris collided with our planet roughly 3 billion years ago. This discovery offers new insights into the violent events that shaped early Earth’s development. The investigation was conducted by researchers from Curtin University and the Geological Survey of Western Australia.

    Their focus was the North Pole Dome in the Pilbara region of Western Australia, an area suspected to contain remnants of an ancient asteroid impact. For decades, scientists had been unable to determine precisely when this impact occurred. The recent study, published in the journal Geology, employed advanced analytical techniques to date tiny minerals within the damaged rocks. These methods produced the most accurate estimate yet for when the collision happened.

    Lead researcher Professor Chris Kirkland explained that the asteroid impact left behind what can be described as a “mineral clock.” The extreme heat and pressure from the collision altered certain minerals, allowing scientists to deduce the timing of the event by examining these changes.

    One key mineral studied was zircon, a particularly tough and tiny crystal that can endure for billions of years, often preserving valuable clues about Earth’s past. At North Pole Dome, researchers discovered zircon crystals with unusual branching shapes, which they believe were damaged and partially reconstructed by the intense heat during the impact. When they measured the age of these zircons, they found them to be approximately 3 billion years old.

    To verify their findings, the team also analyzed another mineral called apatite. This mineral tends to form later, when hot fluids move through cracks in rocks following an impact. Strikingly, apatite yielded the same age as the zircon crystals, reinforcing the accuracy of the dating.

    Professor Kirkland stated that the consistency between two very different minerals provides strong confidence that they correctly identified the timing of a singular, major asteroid collision. This discovery establishes North Pole Dome as the oldest confirmed impact crater on Earth and the only known impact structure from the Archean Eon—a period when Earth’s earliest continents were beginning to form and life was still in its infancy.

    Uncovering evidence of such ancient impacts is particularly challenging because, over billions of years, rocks undergo transformations due to heat, pressure, erosion, and underground fluids, often erasing signs of the original impact. In this case, however, researchers successfully distinguished the evidence of the asteroid strike from subsequent geological alterations.

    This finding advances our understanding of Earth’s impact history, pushing known impact events further back in time than ever before. Scientists hope that these insights will shed light on how asteroid collisions influenced the planet’s surface formation, early continental development, and possibly even conditions suitable for the emergence of life.

    The researchers emphasize that discoveries like this underscore the significance of Western Australia’s ancient geology, which continues to unveil extraordinary stories from Earth’s earliest days.

  • How a giant asteroid’s marks unveil planet birth secrets

    How a giant asteroid’s marks unveil planet birth secrets

    Asteroid 16 Psyche has intrigued scientists for over two centuries. Recent studies suggest that its large impact craters might provide clues about its origins and offer insights into how planets formed during the early days of our solar system.

    Located in the asteroid belt between Mars and Jupiter, Psyche is approximately 140 miles (226 kilometers) across and stands out as the largest known metal-rich asteroid. Scientists theorize it could be the exposed core of an ancient planet that was shattered long ago, although other possibilities exist as well.

    Some believe Psyche might be a conglomerate of rock and metal formed through numerous collisions, or that it perhaps started out with a high metal content from the beginning. To investigate these ideas, researchers at the University of Arizona used computer simulations to explore how a massive crater near Psyche’s north pole could have come into being.

    Their aim was to anticipate what NASA’s Psyche spacecraft, set to arrive in 2029, might discover. Craters serve as natural windows into an asteroid’s interior. When an impact occurs, it can carve deep below the surface, exposing material normally hidden from view. By examining the size, shape, and internal structure of these craters, scientists can better understand what lies beneath.

    In their models, the team recreated a crater roughly 30 miles wide and three miles deep, testing various scenarios. One scenario assumed Psyche has a layered structure with a metallic core enveloped by a thin rocky crust, while another proposed a completely mixed composition of metal and rock.

    Interestingly, both models could produce a crater similar to what has been observed on Psyche. A key factor, however, is porosity—the amount of empty space inside the asteroid. Many asteroids aren’t solid but contain cracks and gaps from previous impacts. This porosity influences how the asteroid responds during a collision; porous bodies tend to absorb more impact energy, resulting in deeper, steeper craters with less debris ejected outward.

    Incorporating porosity into their simulations resulted in more accurate predictions of Psyche’s surface features. These insights will help interpret data from the spacecraft, including crater characteristics, surface composition, and internal density variations.

    This research underscores how Psyche acts like a “fossil” from the early solar system. Similar to how archaeologists study ancient ruins, scientists examine Psyche to understand planetary formation billions of years ago.

    Once the spacecraft arrives, it will analyze Psyche’s surface, gravity, magnetic field, and composition. Comparing these findings with simulation results could confirm whether Psyche is truly an exposed planetary core or something entirely different.

    Regardless of the outcome, Psyche provides a rare glimpse into the core-building blocks of planets and offers valuable clues about the dynamic forces that shaped our solar system.

  • This wild week in science and tech

    [gpt3] rewrite this content in American English and make it unique and human written and plagiarism free and do not include any introductions or extra text and only return the rewritten content

    Meet R1: the shrimp-slinging rival of Tesla’s Optimus

    Forget Wall Street, Ant Group’s latest flex isn’t financial, it’s R1, a humanoid robot that made its debut by cooking shrimp, reportedly, at IFA 2025 tech show in Berlin. While Tesla’s Optimus dreams of factory work, R1 is already auditioning for Iron Chef.

    Ant Group targets Tesla's Optimus and shows off first humanoid robot R1 | The Verge
    Picture credits: The Verge

    At 1.7 meters tall and 110 kilos, R1 looks like a heavyweight but moves at a “grandma-jogging pace.” Still, with 34 joints and surprisingly nimble arms, it can stir, flip, and serve without burning the kitchen down, which already puts it ahead of most humans.


    Artwork by Affan Qasim created using Gemini Pro

    But R1 isn’t just about dinner. Ant Group is pitching it as a tour guide, museum helper, and even a healthcare assistant. The first batch is already clocking in at the Shanghai History Museum, and a flashier second-gen model is in the works.

    The humanoid robot race just got more exciting. With Ant joining Tesla, Boston Dynamics, and others, we’re inching closer to a future where robots don’t just build our stuff, they cook it, serve it, and maybe judge us for ordering extra shrimp.

    Flowing water? In MY asteroid? Preposterous!

    Astronomers have believed that water was only liquid in the earliest moments of our solar system. In a vacuum, water’s boiling point is very low, ensuring that even in asteroids, most water would either freeze or evaporate.

    The theory that water came to Earth trapped in small amounts within asteroids isn’t new but these examinations from Japan’s aerospace exploration agency are: they show that there could have been liquid water flowing on Ryugu — a near-Earth asteroid — nearly a billion years after it was formed, which could say that within the layers of ice in asteroids, there was running water.

    This means there’s a billion-year time period where ice-packed asteroids likely collided with the Earth, spreading much more water much faster than previously imagined.

    Read: BlackRock to invest $700m in UK data centres during Trump visit

    On its own, this isn’t that exciting. But this implies that there are other planets out there that could have received much more water than previously thought possible.

    We’re still waiting on the confirmation for alien life, but the fact that there’s a lot more water to go around may get your hopes (or fears) up.

    Spotify’s latest drop: Audiophile candy most won’t taste

    Spotify’s new lossless audio sounds great, but only if you give it the right setup


    Artwork by Syed Alihasan Agha created using ChatGPT

    Jumping from Spotify’s compressed 96Kbps streams to its standard 320Kbps already feels like swapping a dusty window for clear glass, but stepping up to lossless FLAC is more like polishing that glass until it sparkles, noticeable only if you’re paying close attention.


    Photo Credits: The Verge

    On delicate acoustic tracks, say, the fingerpicked guitar on José González’s ‘Crosses’ or the soft harmonies in Bon Iver’s ‘Holocene’, the extra detail feels intimate and alive. But crank up bass-heavy EDM or fuzzed-out garage rock through Bluetooth earbuds, and those subtleties vanish in the chaos.

    To actually hear the upgrade, you’ll need the app, a wired connection, and a set of solid headphones or speakers. Casual listeners can stick with high-quality streaming, but for audiophiles chasing the tiniest sonic textures, lossless indeed gives Spotify some bragging rights.

    The glass coast

    Every year, rising sea levels and storms erode our coastlines, taking plants and trees with them, leaving us vulnerable to storms and floods, and leaving less area for replantation. But there might be a solution.

    Researcher Sunshine Van Bael and her team, along with Louisiana-based glass recycling company Glass Half Full, grew grasses and trees in a mixture of ground glass and sediment, effectively giving trees and plants more area to grow with less need for actual substrate.

    As of 2022, glass waste made up 6% of Pakistan’s total municipal solid waste. While more work is needed, replicating these results with our mangroves would essentially kill two birds with one stone: waste glass will have a purpose, and we will be protected from the worst of the monsoons’ wrath.

    The freedom to roast

    Mastodon, the open-source alternative to X, has just rolled out support for quote posts. Now this is a big step in the right direction. If you want more traffic than what X already gets, you have to at least have the same features and then some.

    In X, if you write out a horrible take you would probably get thoroughly thrashed by quote retweets (re-X’s?), Mastodon doesn’t want that. Here, they’re giving you the option to prevent specific posts from being quoted, block specific users from quoting you, or even turn it off entirely for anyone but your followers (or anyone at all).

    Read more: Apple unveils iPhone 17, AirPods Pro 3 and new watches under ‘Awe-Dropping’ banner

    Whether or not you like this change, giving people more control over their own visibility online is a good change. But I have to admit, I enjoy being able to see people get cooked for their terrible takes. And if you secretly agree with someone who gets flamed for something they think, then hey, maybe it’s a learning opportunity for you.

    [/gpt3]