Scientists have drilled 1.7 miles deep into Antarctica, pulling up an ice core sample that dates back at least 1.2 million years.
Ice cores are useful tools for investigating how the planetas climate has changed over time.
Scientists say ice cores are really the closest you can get to going back in the time machine and measuring what the atmosphere was like in the past.
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Pedagogy of the Oppressed, a 1970s book by author Paulo Freire, envisions a world not as a given reality, but as “a problem to be worked on and solved.” That mentality is often applied to the greatest social entrepreneurs.