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The Apple Pencil can be such a great tool to upgrade your iPad experience. This Black Friday, we found a jaw-dropping deal ...

On Cyber Monday (Dec. 1), the Apple Pencil USB-C dropped to $49. That's $30 off its $79 list price, for 38% savings.

With proper care, citrine is a beautiful and versatile gemstone for jewelry use. – Robert Weldon Gem and mineral hardness is measured on the Mohs scale. The numbers are based on the relative ease or ...

State Key Laboratory of Bioinspired Interfacial Materials Science, School of Chemistry, Beihang University, Beijing 100191, China ...