Being green

Today I learned an English term. Someone said in an email that someone is "too green". Considering the context of the message, it did not make sense to me. What did caring about environment and nature have to do with her message? So, I searched for the term. When you say someone is too green, it means they are inexperienced, new to their job, not able to navigate and handle issues as good as an experienced person would. It all makes sense now.

Ocean inside Saturn's Moon

"NASA's Cassini spacecraft and Deep Space Network have uncovered evidence Saturn's moon Enceladus harbors a large underground ocean of liquid water, furthering scientific interest in the moon as a potential home to extraterrestrial microbes."

"Gravity measurements by NASA's Cassini spacecraft and Deep Space Network suggest that Saturn's moon Enceladus, which has jets of water vapor and ice gushing from its south pole, also harbors a large interior ocean beneath an ice shell, as this illustration depicts." 
Image Credit: NASA/JPL-Caltech

Reference:

http://www.nasa.gov/press/2014/april/nasa-space-assets-detect-ocean-inside-saturn-moon/#.U0b1cV6xG3F