That video is seriously cool. Thanks again.
Interlocking hands seems to me to be about grip strength. Sometimes it's easier to grip your other hand by interlocking than it is to grip the object you're lifting.
What other things on the technology tree did we skip over and might we discover out in some insect, bird or fish?
We still don't know how tiny insect brains are capable of using so little energy to do so much navigation and learning+memory, right?
Or beyond that, what fundamental physics principles have we somehow missed? Perhaps faster-than-light travel is actually really simple, and we somehow just haven't discovered it yet. Meanwhile, some much more primitive civilization elsewhere has, and is going to invade us soon with their FTL spaceships armed with... cannons equivalent to our Medieval weapons. They'll be in for a big surprise when we shoot back with guided missiles.
2013: https://news.ycombinator.com/item?id=6376191 (183 comments)
2014: https://news.ycombinator.com/item?id=8212984 (10 comments)