🚀 go-pugleaf

Well, thudding in company with Mr Bass, here are a few of my 'mysteries'

(a) We had atoms, then subatomic particles, then quarks.  Is there an
ultimate structure of matter, or will we find more and more fine structure
for ever?

(b) Why has almost every theory of 'small stuff' since Newton thrown up
these wretched infinities?  We have them in gravitation, electrostatics,
classical electrodynamics, and all over quantum physics.  Is this the
consequence of a single bogus assumption, and is that assumption indeed
the assumption that spacetime is continuous?

(c) Are there magnetic monopoles?  More importantly, is there a way to
decide this other than by hunting for monopoles - some simpler experiment
that will disprove one model or the other?

(d) How sure are we that, in the microcosm, gravitational mass is the
same as inertial mass?  How could we ever test this, anyway?

(e) Do antiparticles really travel backwards in time?  I mean, could you
use the spin state of a positron to send one bit of information into the
past?

Well, enough for one day.