Early Marsupial Fossils FoundScurrying around some 80 million years ago, during the age of dinosaurs, an early relative of the present-day opossum was unremarkable in appearance. It looked like, well, a small opossum. More surprising is where it was scurrying: Mongolia.
by Kenneth Chang
(1998)Earliest known marsupial unearthed in ChinaThe oldest known fossil skeleton of an ancestor of modern marsupials has been unearthed in north-eastern China. The spectacular find is 50 million years older than the previous record holder, and helps to fill a key gap in the understanding of early mammal evolution. China's Yixian rock formation, which is 125 million years old, has produced a spectacular haul of early mammal fossils, including, in 2002, the earliest known placental mammal... The discovery of both the oldest known marsupial and placental mammal at the same site gives a powerful boost to the theory that the two important lineages evolved in Eurasia, and then spread to the rest of the world... Some other researchers are unconvinced by this, but nonetheless agree that the find is very important. This is partly because the skeleton suggests the early marsupial could climb trees, just like early placental animals... The earliest known mammal fossil remains were unearthed in Texas, US, and date back 225 million years... Teeth of marsupial-like fossils dating back about 110 million years ago have been found in the US.
by Emma Young
19:00 11 December 03