Illustration of Ekgmowechashala, the last primate to inhabit North America before humans. Credit: Kristen Tietjen, scientific illustrator with the KU Biodiversity Institute and Natural History Museum.
AUSTIN, Texas, October 20, 2008 (ENS) - More than 43 million years ago, when tropical forests and active volcanoes covered west Texas, primates chose to live there in preference to cooler northern ...