The bird, thought to be the only one of its kind in the Western Hemisphere, is presumed to be Stella, an out-of-place raptor spotted at sites across North America in recent years ...
A study led by researchers at the American Museum of Natural History presents the oldest known example in the fossil record ...
Ichthyosaurs were reptiles that swam in the seas during the time of the dinosaurs. They evolved separately around 250 million ...
It is believed to be the only member of its species currently occupying the Western Hemisphere, park officials said.