Storyboard of an Extraterrestrial Monster –Greenland’s Hidden Hiawatha Impact Crater

 

Buried beneath the Hiawatha Glacier is an ancient 31-kilometer-wide impact crater, left when an iron asteroid 1.5 kilometers across slammed into what is today Greenland, possibly within the past 100,000 years reports Paul Voosen in Science. Big enough to swallow Washington, D.C., the crater was detected by Kurt Kjær, a geologist at the Natural History Museum of Denmark in Copenhagen, and 21 co-authors reported this week in Science Advances. The crater was left when an iron asteroid 1.5 kilometers across slammed into Earth, possibly within the past 100,000 years.

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Today’s Planet Earth Report –“Massive Buried Ice-Age Asteroid Crater to Ocean Floor is Dissolving”

 

 

The “Planet Earth Report” connects you to the day’s news headlines on the discoveries, people, and events changing our planet and the future of the human species.

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“Key to Decoding Mars?” –Climate Change Hits the Oldest, Driest Desert on Earth: The Atacama

 

“Our group has discovered that, contrary to what could be expected intuitively, the never-before-seen rainfall has not triggered a flowering of life in Atacama, but instead, the rains have caused enormous devastation in the microbial species that inhabited the region before the heavy precipitations,” said Dr. Alberto G. Fairén, visiting scientist at the Cornell Center for Astrophysics and Planetary Science, who focuses on early Mars environments.
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Satellite Signals Reveal Antarctica’s Hidden Remnants of the Supercontinent Gondwana’

 

Like a story from a science fiction thriller, Antarctica’s long buried history has been revealed using data from the dead European Space Agency’s gravity mapping satellite, unveiling the remnants of ancient lost continents hidden deep beneath the continent’s ice.

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The Secret of the 700-Million-Year Gap in Earth’s History –“Life Appeared”

 

 

There is a 700-million year gap in Earth’s history, and in that time one of the most transformative events happened: life appeared. This missing epoch could hold not just the secret of humanity’s first ancestor, but could guide our search for life on other planets.

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“Ancient Scars” –Our Planet’s Telltale Traces of Collisions With Dark Matter

Minerals deep inside Earth might contain telltale traces of collisions with dark matter — the elusive stuff that researchers think makes up most of the matter in the Universe. Experiments designed to search for these traces could one day complement or even compete with ongoing efforts to detect dark matter directly.

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