The seven Millennium Prize Problems represent some of the hardest unsolved questions in mathematics, including one famously solved by Grigory Perelman, who refused the million-dollar reward.

There are lots of unsolved mysteries in the world of math, and many of them start off with a deceptively simple premise, like ...

The Central Bank sold yuan on the domestic market in the amount of 17.7 bln rubles with settlements on February 3 ...

UAE will continue its efforts aimed at facilitating all initiatives to mitigate its humanitarian consequences, ministry said ...