Their new technique uses smart solvent manipulation and a seeded layer to improve adhesion, efficiency, and durability. The result is a flexible tandem solar cell that rivals rigid models in power ...

A recent Tennessee law makes it a felony to threaten mass violence against schools. A ballooning number of children have been charged under the law, spurring controversy and confusion. The room ...

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Demanding an end to the war, hundreds pressed the militants to relinquish control of the enclave, a rare demonstration against a group that has suppressed dissent with violence. By Vivian Yee ...