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Friday, July 3, 2020
This Weekend’s ‘Earth Hour’ Will Darken The Night Sky Just As A Dazzling Celestial Show Lights It Up

This Weekend’s ‘Earth Hour’ Will Darken The Night Sky Just As...

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Earthrise sequence: Earth rises over the lunar horizon on July 20, 1969, as seen fro Apollo 11. ... [+] (Photo by NASA via Getty Images) ullstein bild via Getty Images “In my hour of darkness, in my time of need.” On Saturday, March 28, 2020 at 8:30 p.m, all around the world, it’s “Earth Hour,”,…
Astronomers say Earth has a new mini-moon, for now

Astronomers say Earth has a new mini-moon, for now

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Earth, as seen from the Moon in 1968, could have pulled a new mini-moon into its gravity. Corbis via Getty Images We have a new space neighbor, at least for a while. Astronomers at the NASA-funded Catalina Sky Survey spotted an asteroid that's caught in Earth's gravity, but the space agency's Center for Near-Earth Objects…
Astronomers say Earth might have a new mini-moon

Astronomers say Earth might have a new mini-moon

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Earth, as seen from the Moon in 1968, could have pulled a new mini-moon into its gravity. Corbis via Getty Images We could have a new space neighbor, at least for a while. Astronomers at the NASA-funded Catalina Sky Survey reckon they've spotted an asteroid that's caught in Earth's gravity."Earth has a new temporarily captured…
Economic costs of rising seas will be steeper than we thought, unless we prepare

Economic costs of rising seas will be steeper than we thought,...

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Rising seas that swamp cities and coastal infrastructure could cost the world more than 4 percent of the global economy each year by 2100 — far more than previously estimated — unless urgent action is taken both to reduce greenhouse gas emissions and to prepare for such impacts from climate change, a new study finds. …
Here are 5 of the weirdest auroras, including the newly spotted ‘dunes’

Here are 5 of the weirdest auroras, including the newly spotted...

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Sky watchers have spotted a new jewel in the crown of northern lights that shimmer over the top of the world. The new kind of spectacle is a rare, faint phenomenon dubbed the “dunes.” Unlike other auroras that hang in the sky like luminous curtains, the dunes appear as green bands running parallel to the…
Tiny meteorites suggest ancient Earth had a carbon dioxide–rich atmosphere

Tiny meteorites suggest ancient Earth had a carbon dioxide–rich atmosphere

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Earth’s atmosphere 2.7 billion years ago may have been more than two-thirds carbon dioxide. That finding comes from a new study that simulates how the ancient atmosphere may have interacted with bits of cosmic dust falling through the sky. Such a carbon dioxide–rich atmosphere may also have created a powerful greenhouse gas effect, researchers suggest…
Fed by human-caused erosion, many river deltas are growing

Fed by human-caused erosion, many river deltas are growing

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River deltas, the fans of sediment sweeping out from the mouths of rivers, are gaining ground. Globally, delta land area increased by 54 square kilometers per year from 1985 to 2015, scientists report January 23 in Nature. A quarter of that gain is due to deforestation freeing soil from the grip of tree roots, allowing…
A 2.2-billion-year-old crater is Earth’s oldest recorded meteorite impact

A 2.2-billion-year-old crater is Earth’s oldest recorded meteorite impact

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A 70-kilometer-wide crater in Western Australia has officially earned the title of Earth’s oldest known recorded impact. Yarrabubba crater is a spry 2.2 billion years old, plus or minus 5 million years, researchers report January 21 in Nature Communications.    Moving tectonic plates along with erosion have wiped away much of the evidence for many…
Volcanic gas bursts probably didn’t kill off the dinosaurs

Volcanic gas bursts probably didn’t kill off the dinosaurs

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Massive gas bursts emitted by volcanoes about 66 million years ago probably couldn’t have caused a mass extinction event that spelled doom for all nonbird dinosaurs, new research suggests. Data on ancient temperatures, combined with simulations of the shifting carbon cycle in the ocean, lend support to the hypothesis that a giant asteroid impact —…
2019 was the second-warmest year on record

2019 was the second-warmest year on record

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The year 2019 is officially the second warmest in the 140-year record of modern temperatures compiled by both NASA and the U.S. National Oceanographic and Atmospheric Administration, scientists said January 15. The five warmest years on record have all occurred since 2014 — making 2019 the end to the hottest decade ever recorded. The more…

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