Near Earth Impact

Near-Earth Object Impacts News -- ScienceDaily Near-Earth Objects. Near Earth Asteroids. Meteorites have impacted planet Earth many times. Scientists review the geological records and make predictions of risks of near Earth object impacts.

  • Toward end of Ice Age, human beings witnessed fires larger than dinosaur killers
    on February 1, 2018 at 10:32 pm

    About 12,800 years ago, thanks to fragments of a comet, humans saw an astonishing 10 percent of the Earth's land surface, or about 10 million square kilometers, consumed by fires. […]

  • International study identify the process of rock formed by meteors or nuclear blasts
    on January 16, 2018 at 5:37 pm

    Scientists have made a model to map out the phases in which silica (SiO2) transforms into coesite, by analyzing how the inelastic scattering of light among molecules changes according to pressure variation. […]

  • Ingredients for life revealed in meteorites that fell to Earth
    on January 10, 2018 at 7:13 pm

    A detailed study of blue salt crystals found in two meteorites that crashed to Earth -- which included X-ray experiments found that they contain both liquid water and a mix of complex organic compounds including hydrocarbons and amino acids. […]

  • Extra-terrestrial Hypatia stone rattles solar system status quo
    on January 9, 2018 at 4:24 pm

    Analyses on a small pebble found in south-west Egypt cast significant questions on a widely-held view about the primitive pre-solar dust cloud which our Sun, Earth and other planets were formed from. Researchers found exotic micro-mineral compounds in the 'Hypatia' stone that are not known to occur on Earth, elsewhere in our solar system, or in known meteorites or comets. […]

  • Skye high impact: Geologists in Scotland discover a 60-million-year-old meteorite strike
    on December 14, 2017 at 3:08 pm

    Geologists exploring volcanic rocks on Scotland's Isle of Skye found something out-of-this-world instead: ejecta from a previously unknown, 60 million-year-old meteorite impact. The discovery, the first meteorite impact described within the British Paleogene Igneous Province (BPIP), opens questions about the impact and its possible connection to Paleogene volcanic activity across the North Atlantic. […]

  • Meteorite analysis shows reduced salt is key in Earth's new recipe
    on December 5, 2017 at 3:42 pm

    Scientists have found the halogen levels in the meteorites that formed the Earth billions of years ago are much lower than previously thought. […]

  • Space dust may transport life between worlds, research suggests
    on November 20, 2017 at 4:13 pm

    Life on Earth might have originated from tiny organisms brought to our planet in streams of fast-moving space dust, according to a new study. […]

  • Site of asteroid impact changed the history of life
    on November 10, 2017 at 4:39 pm

    An asteroid, also known as the Chicxulub Impactor, hit Earth some 66 million years ago, causing a crater 180 km wide. The impact of the asteroid heated organic matter in rocks and ejected it into the atmosphere, forming soot in the stratosphere. […]

  • Transformation of graphite into hexagonal diamond documented
    on November 2, 2017 at 1:59 pm

    A team of researchers has for the first time observed and recorded the creation of hexagonal diamond under shock compression, revealing crucial details about how it is formed. The discovery could help planetary scientists use the presence of hexagonal diamond at meteorite craters to estimate the severity of impacts. […]

  • Dinosaur-killing asteroid impact cooled Earth's climate more than previously thought
    on October 31, 2017 at 3:14 pm

    The Chicxulub asteroid impact that wiped out the dinosaurs likely released far more climate-altering sulfur gas into the atmosphere than originally thought, according to new research. […]

  • Moment of impact: A journey into the Chicxulub Crater
    on October 23, 2017 at 6:09 pm

    When the Chicxulub asteroid slammed into Earth about 66 million years ago, it obliterated 80 percent of Earth's species, blasted out a crater 200 kilometers across, and signaled an abrupt end to the Cretaceous Period. The impact, its catastrophic effects, and its aftermath have engrossed scientists and the public alike since it was first discovered. […]

  • Studies of ‘Crater Capital' in the Baltics show impactful history
    on September 18, 2017 at 1:28 pm

    Studies of craters in the Baltics (Estonia) are giving insights into the many impacts that have peppered the Earth over its long history. In southeastern Estonia, scientists have dated charcoal from trees destroyed in an impact to prove a common origin for two small craters, named Illumetsa. A third submarine crater located on the seabed in the Gulf of Finland has been measured and dated with with precision. […]

  • Experiments cast doubt on theory of how Earth was formed
    on August 14, 2017 at 1:28 pm

    New geochemical research indicates that existing theories of the formation of the Earth may be mistaken. […]

  • The last surviving species on Earth may well be the tardigrade
    on July 14, 2017 at 11:14 am

    The world's most indestructible species, the tardigrade, an eight-legged micro-animal, also known as the water bear, will survive until the sun dies, according to a new study. […]

  • Scientist warns of asteroid danger
    on June 20, 2017 at 4:11 pm

    An astrophysicists has warned that an asteroid strike is just a matter of time. […]

  • Comets may have delivered significant portions of Earth's xenon
    on June 8, 2017 at 6:55 pm

    A new study suggests that roughly 22% of the element xenon found in Earth's atmosphere may have come from comets. […]

  • High-pressure experiments solve meteorite mystery
    on June 7, 2017 at 4:37 pm

    With high-pressure experiments at DESY's X-ray light source PETRA III and other facilities, a research team has solved a long standing riddle in the analysis of meteorites from Moon and Mars. The study can explain why different versions of silica can coexist in meteorites, although they normally require vastly different conditions to form. The results also mean that previous assessments of conditions at which meteorites have been formed have to be carefully re-considered. […]

  • Massive craters formed by methane blow-outs from the Arctic sea floor
    on June 1, 2017 at 7:18 pm

    Hundreds of massive, kilometer-wide craters on the ocean floor in the Arctic were formed by substantial methane expulsions, new research explains. […]

  • 'Tiny clocks' crystallize understanding of meteorite crashes
    on May 26, 2017 at 6:37 pm

    Scientists are using new imaging techniques to measure the atomic nanostructure of ancient crystal fragments at meteorite impact sites. The end goal? To understand when impacts ended and life began. […]

  • New theory on how Earth's crust was created
    on May 5, 2017 at 4:10 pm

    Conventional theory holds that all of the early Earth's crustal ingredients were formed by volcanic activity. Now, however, earth scientists have published a theory with a novel twist: some of the chemical components of this material settled onto Earth's early surface from the steamy atmosphere that prevailed at the time. […]

  • Falkland Islands basin shows signs of being among world's largest craters
    on May 4, 2017 at 5:16 pm

    A basin in the Falkland Islands exhibits traits of a large impact crater, according to a new analysis by a team of scientists. […]

  • Ancient meteorite impact sparked long-lived volcanic eruptions on Earth
    on May 3, 2017 at 2:08 pm

    Large impacts were common on the early Earth and were likely much more important than previously thought in shaping our planet. The findings raise interest in the possibility of volcanism also shaping similar structures on Mercury, Venus, Mars and the Moon. […]

  • Hazardous asteroid effects ranked from least to most destructive
    on April 19, 2017 at 4:20 pm

    If an asteroid struck Earth, which of its effects -- scorching heat, flying debris, towering tsunamis -- would claim the most lives? A new study has the answer: violent winds and shock waves are the most dangerous effects produced by Earth-impacting asteroids. […]

  • Upper part of Earth’s magnetic field reveals details of a dramatic past
    on March 22, 2017 at 4:28 pm

    Satellites have been mapping the upper part of the Earth magnetic field by collecting data for three years and found some amazing features about the Earth’s crust. The result is the release of highest resolution map of this field seen from space to date. This ‘lithospheric magnetic field’ is very weak and therefore difficult to detect and map from space. But with the Swarm satellites it has been possible. […]

  • Mars volcano, Earth's dinosaurs went extinct about the same time
    on March 21, 2017 at 1:27 pm

    Arsia Mons produced one new lava flow at its summit every 1 to 3 million years during the final peak of activity, about 50 million years ago. The last volcanic activity there ceased about 50 million years ago -- around the time of Earth's Cretaceous-Paleogene extinction, when large numbers of our planet's plant and animal species (including dinosaurs) went extinct. […]

  • Discovery of widespread platinum may help solve Clovis people mystery
    on March 9, 2017 at 5:06 pm

    No one knows for certain why the Clovis people and iconic beasts -- mastodon, mammoth and saber-toothed tiger -- living some 12,800 years ago suddenly disappeared. However, a discovery of widespread platinum at archaeological sites across the US has provided an important clue in solving this enduring mystery. […]

  • Craters show Earth is bombarded at random
    on March 7, 2017 at 4:29 pm

    Asteroids don't hit our planet at regular intervals, as was previously thought. Earth scientists have reached this conclusion after analyzing impact craters formed in the last 500 million years, concentrating on precisely dated events. […]

  • Study opens new questions on how the atmosphere and oceans formed
    on February 27, 2017 at 5:03 pm

    Seawater cycles throughout Earth's interior down to 2,900km, much deeper than previously thought, reopening questions about how the atmosphere and oceans formed. […]

  • Why are there different 'flavors' of iron around the Solar System?
    on February 20, 2017 at 6:47 pm

    New work shows that interactions between iron and nickel under the extreme pressures and temperatures similar to a planetary interior can help scientists understand the period in our Solar System's youth when planets were forming and their cores were created. […]

  • Myth busted: No link between gigantic asteroid break-up, rise in biodiversity
    on February 3, 2017 at 4:01 pm

    Some 470 million years ago, during the middle part of the geological period known as the Ordovician, an asteroid collision took place somewhere between Mars and Jupiter. The collision caused an explosion that sent a cascade of meteorites towards Earth. […]