Spacetime With Stuart Gary

Stream episodes on demand from www.bitesz.com (mobile friendly) * Galaxies at the cosmic dawn Astronomers have peered back to the dawn of time -- discovering 23 young galaxies, seen as they were just 800 million years after the Big Bang. The findings reported in the Astrophysical Journal represent one of the deepest ever observations into the 13.8 billion year old universe. *Cassini begins its final orbits around Saturn NASA's Cassini spacecraft has entered new territory in its final mission phase, the grand finale, as embarks on a set of ultra-close passes through Saturn's upper atmosphere with its final five orbits around the ringed world. Cassini completed the first of these five passes over Saturn on Monday. *The ancient Earth was a water world A new analysis of mineral grains indicates that the ancient Earth was most likely a water world -- barren, flat, and almost entirely under water with only a few small islands sticking out above the surface. The findings are based on a study of 4.4 billion year old