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Clashes between police, student protesters force week-long shutdown at South Africa's Wits University

Clashes between police and student protesters forced South Africa`s Wits University to suspend classes for the second time in less than a month, as unrest mounted again over education costs.

Diamonds used to "probe" ancient Earth

Diamonds used to "probe" ancient Earth

While the diamonds of this study were found in 3 billion-year-old sedimentary rocks, diamond formation occurred much deeper, within Earth's mantle.