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The basalt below the hominins is dated to 1.8 million years ago, and the geomagnetic polarity of the
This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
Preschool: 3–6 years.
Climate change occurs over millions of years
Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take