Astronomers believe this barred spiral galaxy could be the oldest example of its kind ever observed. Research led by Daniel Ivanov, a graduate student in physics and astronomy at the Kenneth P.

"I'm stunned." says Per Ahlberg of Uppsala University, who coordinated the study; "A single track-bearing slab, which one person can lift, calls into question everything we thought we knew about when ...

For decades, the asteroid that ended the reign of the dinosaurs has stood as a symbol of total planetary devastation. But hidden within the chaos it unleashed was the seed of a biological rebirth. In ...