WOW! The screenshots are amazing!
It seems that the 2-month delay did make a very magnificent VV4!!
Can't wait!!

OOH! I already have predictions based on the Tech screenie:
Dendrology- obviously needed for the "Tree of Life"
Food Mastery - to avoid poisonous food/ gather better food??
Science - Lvl 3 needed for astronomy - also something to do with the "Tree of Life"
Medicine - solve the very low fertility rate/ something to do with the Tree of "LIFE"
Construction - to build huts or an observatory??
Learning - To help build this wheel near the waterfall??