Science
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Retiring Pentagon official says UFO activity is either aliens or 'other people' and 'not good'
If the UFO activity isn't extraterrestrial, then it could mean foreign agents, Sean Kirkpatrick said.
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Nobel Prize in medicine awarded to scientists whose research enabled mRNA COVID-19 vaccines
The researchers "fundamentally changed our understanding of how mRNA interacts with our immune system," the Nobel Prize panel said.
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NASA returns first asteroid samples to earth
"This marks the US's first sample return mission of its kind and will open a time capsule to the beginnings of our solar system," NASA said.