An analysis of 42 million year old fossilised micro-organisms at Hampden Beach, near the Moeraki Boulders in North Otago, New Zealand, suggests that Antarctica at that time was yet to develop extensive ice sheets.
Back then, New Zealand was about 1100km further south, closer to Antarctica, at the same latitude as the southern tip of South America.
But, the researchers found that the water temperature was 23degC - 25degC at the sea surface and 11degC-13degC at the bottom.
"This is too warm to be the Antarctic water we know today," said Dr Catherine Burgess from Cardiff University's School of Earth and Ocean Sciences.
Click here to find out more from Stuff Magazine, New Zealand.
To sign up to receive daily emails about the Matrix Shackleton Centenary Expedition's progress please click here.
Get a capsule view of who we are, where we're going and why we're doing this by reading our brochure.
View our brochure
(PDF 2.5mb)
Sir Ernest Shackleton is widely known as one of the most inspirational leaders of the twentieth century. The Shackleton Foundation is a new charitable trust.
Matrix Group are proud to be the Headline Sponsors of the Shackleton Centenary Expedition

The South Pole Gazette is a round-up of Antarctic news stories from around the web.
The SCE receives a small percentage of the price of all Antarctic and Shackleton books bought through the links listed below. Please note that buying through our UK Amazon affiliate account you are directly helping to sponsor the Expedition.
Please don't hesitate to get in touch with the SCE if you have any questions regarding our project, or if you would like to know more about how you can become a sponsor.
The Shackleton Centenary Expedition,
c/o The Lansdowne Club,
9 Fitzmaurice Place,
London
W1J 5JD
Email us at info@shackletoncentenary.org
For press enquiries, please contact Mark Cooper at Van Communications, mark.cooper@vancomms.com
RSS feeds are a way of keeping up to date with your favourite websites by delivering fresh content to your desktop.
The SCE is a not-for-profit venture of the Shackleton Foundation.
All rights reserved © 2006 The Shackleton Centenary Expedition [SCE] except where noted.
Company No. 06107694, Charity No. 1118686.
The Shackleton Centenary Expedition, c/o The Lansdowne Club, 9 Fitzmaurice Place, London W1J 5JD
"Difficulties are just things to overcome, after all." - EHS 1909
Sponsored by Matrix