[extropy-chat] HISTORY: Solved & Unsolved Riddles

[Adrian Tymes]

--- John K Clark <jonkc at att.net> wrote:
> 5) How does turbulence work?

Microscopic irregularities in the flow, under
intense conditions (high pressure or otherwise high
energy), get maginified to macroscopic proportions.

> 6) How does friction work?

A few molecules on one surface keep bonding and
debonding with the adjacent, moving surface.  Given a
few moments, more bondings occur - which is why static
friction is higher than moving friction.  This was
actually studied in depth when they came out with
geckotape a while back.

> 8) What survival value did our ancestors find
> walking on 2 legs gave them?

Just a guess, but perhaps both longer-ranged sight and
the freeing up of 2 limbs for constant tool use?