An icon in the shape of a lightning bolt. Impact Link Flights to and from Haiti have been suspended after bullets hit planes operated by three US airlines: Spirit, JetBlue, and American.
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The chances of intelligent life emerging in our universe—and in any hypothetical ones beyond it—can be estimated by a new ...
Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...
A novel theoretical model based on universal expansion and star formation suggests that our universe might not have the ...
read and understand the notation and analyses of a wide class of models in the scientific literature, including foundational topics in microeconomics formulate and formalize a wider range of models ...
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