Same species found at both ends of Earth.

Proof, of course, that the Earth is hollow. From LiveScience:

Scientists have determined that at least 235 species live in both polar seas despite the 8,000 miles (13,000 km) between the ends of the Earth.

How some of the creatures wound up at the top and bottom of the planet is a mystery. Distance and habitat divisions — such as warm water between the two regions — are among the things that can separate creatures and lead to new species. A DNA analysis is underway to confirm if the like species are in fact identical, the researchers announced today.

[...] Among the beasts that call both polar seas home are marathon migrators such as grey whales and birds. But the researchers, working on the ongoing Census of Marine Life, also found bipolar worms, crustaceans, and angelic snail-like pteropods.