Pensioner, 77, slipped into freezing water but his dog Dick raised the alarm, summoning a rescuer.
While in another incident bystanders shoot a cell phone film of a man drowning, not thinking to call the emergency services.
A dozen out of the 15 teams finished the race which began three weeks ago.
Loyal pet was freed but sadly died after being rushed to the vet by animal activists after suffering hypothermia in minus 32C.
Remains from the Zhokhov island in the East Siberian Arctic show trained sled dogs existed almost 10,000 years ago.
Ruta needed her paws amputated after being left outside in -30C but kind-hearted people are raising money for treatment.
The tiny dog was lost for a week after owner walked it in a storm without a lead.
Chained to a tree and bitten, five-year-old Masha is used as bait to hone skills in a competition to find the best hunter.
Famous traveller and film director Nicolas Vanier embarks on a new epic dog sled trip.
Miracle survival for Liza Grabovskaya in temperatures of minus 12C, lost for 24 hours.