A suspected gas explosion has caused a tunnel collapse at a hydropower project in India's Sikkim state, near the Chinese ...

More toxic than normal air pollution, wildfire smoke can linger in the air for weeks and travel thousands of miles.

New video footage released by Ukrainian officials today shows an assassin targeting multimillionaire Vadym Yermolaiev, his ...

Fighting between the U.S. and Iran has intensified. But hopes for a possible diplomatic solution have shown stubborn signs of ...