More News PhotosMay 4, 2009--The oldest seahorse fossils discovered to date have been uncovered in Slovenia, including this two-inch-long (five-centimeter-long) adult female Hippocampus sarmaticus fossil (left, and in an artist's reconstruction, right).The 13-million-year-old finds, which include the only known extinct seahorse species, are shedding light on how the naturally weak swimmers managed to disperse around the world.(Related pictures: "Five New Pygmy Seahorse Species Found.")Researcher