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Science Corner Articles

How Has Your Address Moved Over the Past 750 Million Years?

Some 240 million years ago, an enormous supercontinent known as Pangea encompassed nearly all of Earth’s extant land mass, Pangea bore little resemblance to our contemporary planet, but thanks to a recently released interactive map interested parties can now superimpose...

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Video – How Earth Has Changed in 1.8 Billion Years

Among the planets in the Solar System, Earth is unique for having plate tectonics. Mapping our planet through its long history creates a beautiful continental dance — mesmerizing in itself and a work of natural art. This is the first time...

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How do we know how old Earth is?

By measuring radioactive elements in rocks from Earth and other parts of the solar system, scientists can develop a timeline of our planet’s early years. Earth is roughly 4.54 billion years old. In that time, it has seen continents form...

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Hells Canyon Caves Reveal When it was Cut

The origin story of Hells Canyon, North America’s deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event likely created a river over the deep...

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Evidence Elsewhere

Evidence Elsewhere of Ice-Age Floods? Q – Is there evidence elsewhere in the world of ice age floods? Intuitively, I would think glaciers dammed other rivers, created lakes and then eventually collapsed? A – Your instincts are correct.  The rivers...

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Ancient British Isles Ice Sheet Time-Lapse Animation

The rapid decline of the British-Irish Ice Sheet thousands of years ago may hold lessons for how melting ice sheets in Greenland and Antarctica will influence sea-level rise in the future. In an animation that spans tens of thousands of years,...

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Rounded Boulders Spokane

Rounded Boulders in Spokane Ice Rafted Erratics? Q – I have noticed places around Spokane where there are large accumulations of similarly-size boulders. They are smooth and generally about a meter in diameter.. The type of stone varies, but none...

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Height of Dry Falls

height of dry falls Q – I am a long time resident and have been to Dry Falls several times. Can you please tell me the elevation change between the top of the falls to the lake below ? Do...

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The first people in the Americas

The first people to arrive in the Western Hemisphere were Indigenous Americans, who were descended from an ancestral group of Ancient North Siberians and East Asians. They likely traveled along the Bering Land Bridge by land or sea. When the first Americans...

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Modeling Time: Human, Geologic, Cosmologic

It’s difficult for most people to grasp the immensity of time as it’s viewed by archeologists, much less as it’s viewed by geologist or cosmologists. One way often used by those scientists to model time in terms that others can...

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