It's a hundred years to the day since the Terra Nova - the ship that carried Captain Scott and his crew on their fateful journey to the South Pole - arrived back in Cardiff.
Tom Sheldrick reports.
More top news
The world record attempt will raise money for the foundation set up in memory of the Olympic gold medallist, who died in May 2013.
In today's Newsweek, Carl talks about what the 'No' vote in the Scottish Referendum could mean for Wales and the impact of legal highs.
England manager talent spotting at Swansea City v Southampton at the Liberty Stadium