Great white sharks found in the Mediterranean Sea could be living there today because their ancestors took a wrong turn about 450,000 years ago.
Sharks studied by scientists were found to be related to those near Australia - on the other side of the world!
Experts reckon female sharks got lost while migrating thousands of years ago - and ended up in the Mediterranean.
It's thought the sharks have carried on living there because they like to return to where they were born.
The Mediterranean is the stretch of sea found between southern Europe and northern Africa.
Great white sharks are known for migrating the long distance between Australia and South Africa.