They've made every preparation possible, but still can't be sure their equipment will be enough.
The explorers, led by Ranulph Fiennes, arrived in Eastern
With temperatures known to dip as low as minus 130 degree Fahrenheit (minus 90 degrees Celsius) during the winter, high-tech clothing and specially-modified equipment for the snow and ice is the team's only defense again interminable wind and cold.
The problem is, Antarctica is so darn cold, that the team members were not able to properly test their two main life-lines before the big trip.
"The trouble is that in the UK test chambers only go down to -58 Celsius (-72.4 Fahrenheit). Therefore it is unclear how the clothing and equipment will stand up to the seriously harsh conditions," expedition co-leader Anton Bowring, who will not be making the trek across the icy continent, wrote us from the ship.
He adds: "However, we are confident that everything possible has been done during the past five years of planning to ensure that we have a good chance of success."
You can follow The Coldest Journey team on their blog or check out our slideshow to see how their expedition has been going so far.