Two-headed sharks appearing all over the world!

It sounds like something out of a horror movie, but indeed it's true - mysterious two-headed sharks are appearing all the world and scientists don't know why.

This puzzling trend started in 2008  when a two-headed blue shark embryo was caught off the coast of Australia, and in 2013, a group of Floridian fishermen strained to haul in a large Bull shark, according to to NZ Herald.

Two-days-ago Spanish researchers found a two-headed Atlantic saw tail catshark embryo while rearing hundreds of sharks for human health research.

It is the first discovered example of a two-headed shark born by an oviparous shark species - a shark that lays eggs.

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