SCIENCE IN THE NEWS WEEKLY
Ancient Past: A New Meaning for Stonehenge?
British archaeologists said last week that Stonehenge, the prehistoric stone monument, appears to have served as a cemetery for as long as 500 years and may have been a burial site for a single important family, perhaps a royal dynasty.
In other news, researchers said a massive release of methane 635 million year ago may have caused a jump in temperature that triggered rapid melting of global glaciation on earth. The sudden burst of methane may have occurred when ice sheets that stretched all the way to the equator broke apart.
Scientists say a 380-million-year-old fossil fish with an embryo still attached to its umbilical cord has provided the oldest example of a live birth. The specimen was found in Australia. Until now, scientists thought creatures from that time period reproduced by laying eggs.
And speaking of fossils, New Jersey sediment known as glauconite has yielded some curious specimens of late. One in particular, of a sabertooth salmon, suggests that the dinosaur-era fish may have survived longer than anyone thought, based on the geologic record.
And, finally, divers reported finding the ruins of an ancient temple in the Nile River that was built in honor of the Egyptian fertility god Khnum. Because the river has shifted course over the centuries, archaeologists said they expect to make other such finds through underwater excavations.
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PODCAST & VIDEO: 3D Printing Replacement Body Parts
Regenerative medicine, a fledgling field with the aim of regrowing parts from a person’s own cells, is being amplified with 3D-printing technology, which can now use organic materials to create scaffolds that cells need to grow into their final forms. Richard Wysk, a professor of industrial and systems engineering at North Carolina State University, discusses the latest successes with this research, and the timeline for creating more complicated structures.
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