Ancient polar sea reptile fossil is oldest ever discovered in Southern Hemisphere
![Ancient polar sea reptile fossil is oldest ever discovered in Southern Hemisphere](https://i2-prod.mirror.co.uk/incoming/article33151634.ece/ALTERNATES/s615/0_Ancient-polar-sea-reptile-fossil-is-oldest-ever-discovered-in-Southern-Hemisphere.jpg)
The confirmation of this nearly 50-year-old fossil as the oldest sea-going reptile ever found in the Southern Hemisphere potentially revolutionises our understanding of ancient marine migrations.