hi. If I'm not wrong ,there was a question about birds & mammals memories !
also , a topic was on 2 groups of people who had traveld in the past to remote place and lately based on their way of eating! -food- remaining things
of thier tools, it's discovered that there was an other group of people lived close to the 1'st group without knowing each other! :hmm:
-anyway , it was quite hard to me. especially speaking section :crazy: