Russia nuclear-powered icebreakers Northern Sea Route

Russia is the only country operating nuclear-powered icebreakers

Russia is the only country that builds and operates nuclear-powered icebreakers. Their reactors let the ships work for long periods in the Arctic, where they keep shipping routes open and support travel along the Northern Sea Route.

Stars move through a galaxy's spiral arms

The bright spiral arms of a galaxy are not permanent groups of the same stars. Stars move into and out of the arms. The arms are denser regions where gas is compressed and new stars are more likely to form.

The Union blockade drove ordinary ships from Confederate ports

European ships stopped calling at Confederate ports because they could not get insurance and were too slow to evade the Union blockade. Fast blockade runners still smuggled supplies, but the South exported less than 10% of its cotton.

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Russia nuclear-powered icebreakers Northern Sea Route

Russia is the only country operating nuclear-powered icebreakers

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