From 1868 to 1879, he was the superintendent of all schools of northern Siberia.

There may be places with worse weather - northern Siberia, say - but the summit is one of the few that has the documentation.

When this failed, he was deported to northern Siberia.

An air mass originating over northern Siberia in winter may be indicated as "cA".

If you spend six months in northern Siberia, you don't want heartache.

Slightly later, the woolly mammoths also disappeared from continental northern Siberia.

It is found from Fennoscandia and Estonia to northern Siberia.

Northern Siberia in particular is a climatic hot spot-an area that is warming faster than the rest of the planet.

And the set is carved from the tusks of the woolly mammoths, found in northern Siberia, where the animals became extinct about 10,000 years ago.

A main exploratory site is the Popigai crater in the wilds of northern Siberia.