Skip to main content
  1. News
  2. Science & Space

Global cooling following the Chicxulub asteroid impact proven

See also

The Chicxulub asteroid is commonly thought of as the dinosaur killer. New research conducted by Johan Vellekoop from Utrecht University and colleagues from VU University Amsterdam, and the Royal Netherlands Institute of Sea Research has proven that a global cooling event followed the impact of the Chicxulub asteroid. The study was reported in the May 12, 2014, edition of the journal Proceedings of the National Academy of Sciences.

The researchers examined the shape and size of sea shell fragments taken from the Brazos River between Waco, Texas and Hearne, Texas before, during, and after the Chicxulub asteroid event that occurred 66 million years ago. The analysis was done on multiple core samples. The Brazos River area was located between the Gulf of Mexico and the Western Interior Seaway at this time in history.

The boundary between the Cretaceous time frame and the Paleogene era had shells that were much more fragmented than the shells found in the layers of sediment before and after the Chicxulub asteroid impact. The fragmentation is indicative of a tsunami caused by the asteroid impact. High concentrations of iridium in the boundary layer had to have come from the asteroid because iridium is not a common element to Earth.

An analysis of the lipid content of the core samples revealed a distinct temperature decrease after the Chicxulub asteroid impact that lasted for several decades. Temperatures decreased by as much as 45 degrees Fahrenheit. The temperature decrease and the global cooling event are explained by the massive amounts of dust and water vapor that were exploded into the Earth’s atmosphere blocking sunlight by the impact of the six miles in diameter Chicxulub asteroid. This study provides extensive evidence of the cooling effects of the Chicxulub asteroid on Earth’s climate and the resulting deaths of dinosaurs and many other species.



  • Sterling loses Clippers
    Donald Sterling loses big in court with no option for an appeal
  • Russia violating arms treaty?
    Russia is testing a long-range missile which violates an INF arms treaty
    World News
  • Ebola outbreak
    The Ebola epidemic in West Africa has proven to be quite difficult to contain
    Health News
  • Virginia same-sex marriage
    The ban on same-sex marriage is ruled unconstitutional in Virginia
    US News
  • Abigail Hernandez suspect
    A suspect is in police custody for the disappearance of Abigail Hernandez
  • Bachelorette finale
    'The Bachelorette' is in the books, which lucky guy got Andi's final rose?

Related Videos:

  • Buzz Aldrin and the American flag on the moon
    <iframe width="420" height="315" src="//;allowfullscreen=true&amp;autoplay=1"></iframe>
  • Orbital Sciences rocket brings supplies and experiments to space station
    <div class="video-info" data-id="518318477" data-param-name="playList" data-provider="5min" data-url=""></div>
  • Liftoff Apollo 11
    <iframe width="420" height="315" src="//;allowfullscreen=true&amp;autoplay=1"></iframe>