Answer:
Canine children.
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
What do you call a pig that is no fun to be around?
I go up when the rain comes down. What am I?
What room do ghosts avoid?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.