PARIS (AFP) - Caves in the Sun-scorched, treeless wilderness of southern Australia's Nullarbor plain have revealed one of the world's most remarkable collections of fossils, including species of now-extinct kangaroos that lived hundreds of thousands of years ago. The three Thylacoleo caves, located about 100 kilometers (60 miles) from the coast, were uncovered by potholers in 2002. The find "is without precedent in Australia. Several new and previously incompletely known species are represented by whole skeletons," enthuse a team of researchers, reporting on the treasure trove in Thursday's issue of Nature. The fossils date back to the Middle Pleistocene era,...