Answer:
It is worldwide, but once only a spider could weave one
A home of wood in a wooded place, but built not by hand. High above the earthen ground, it holds its pale blue gems. What is it?
What looks back but cannot see?
Who is it that rows quickly with four oars, but never comes out from under his own roof?
What is up thatβs also down? Whatβs a smile and a frown?
What gets bigger the more you take away?