Arctic rivers are sending a warning. Climate change is changing the type of nitrogen they carry. This shift matters because ...

The An-24 plane had been on the final leg of a route from Khabarovsk in the far south-east of Russia. The Angara airlines Antonov 24 plane is reported to be about 50 years old, and has had trouble in ...

Two members of the flight crew were killed. In 2011, another Angara An-24 crashed into the Ob river in Siberia, killing seven passengers.