The Week's Science News: From Stars To Arsenic-Eating Bacteria07:57
Download

Play
This photo provided by NASA, taken in 2006 by the Hubble Space Telescope, shows a cluster of galaxies. (AP)
This photo provided by NASA, taken in 2006 by the Hubble Space Telescope, shows a cluster of galaxies. (AP)

Astronomers now say that the universe holds 300 sextillion stars, that's a three followed by 23 zeros, triple the number previously thought to exist. Also this week, NASA announced the discovery of a bacteria that has a different chemical composition than any other life on earth, and can survive on arsenic - something that should kill, not sustain life.

Joining us to wrap up the latest science news is Kelly Beatty, senior contributing editor at Sky and Telescope magazine.

This segment aired on December 3, 2010.

Support the news

+Join the discussion
TwitterfacebookEmail

Support the news