Ciro Santilli @cirosantilli 37

A bit like the classification of simple finite groups, they also have a few sporadic groups! Not as spectacular since as usual continuous problems are simpler than discrete ones, but still, not bad.

It is not obvious why there have to be two sexes.

Sex itself is obvious: by mixing genes we increase variability.

But having two sexes rather than just being able to reproduce with anyone reduces the possible mating pool by half!

Including notably schools that follows Ciro Santilli's ideas as shown at how to teach.

1925 by Charles Kay Ogden.