What do the oldest European artworks and the domestication of animals have in common? A Penn State University paleoanthropologist suggested that they are evidence of a unique connection with animals that profoundly shaped the evolutionary development of early man.

Do chimpanzees have their own culture? If so, some researchers would connect their behaviors to aspects of human culture, which they believe supports an evolutionary relationship. But current developments shed doubt on that idea.

Mosasaurs were marine reptiles with large jaws and big teeth. Their fossils have been found on every continent, including Antarctica. They grew longer than 40 feet, and although they had fearsome jaws that marked them as a formidable predator, scientists had until now assumed that they were only mediocre swimmers.

The theory of plate tectonics explains many earth features, like ocean floor trenches and sediment-free mid-ocean ridges made of hardened magma. The popular theory holds that continents drift slowly across earth's surface atop deeply buried molten rock, and that plate movements creep along at leisurely paces. But new research by Yale University geologists calls that into question.

Mosasaur fossils have been recovered from Late Cretaceous rocks all over the world. Most are just a fossilized tooth or perhaps a loose rib or vertebra. Occasionally, several bones are discovered still together. Conventional wisdom holds that creatures from this period died millions of year ago. If that's true, why do some still have soft tissue?