[Ben] Again, another ingredient that we're hugely familiar with the concept of a sap from a tree, whether it's birch or maple, but I'd never heard of this.
The sap could not move upward for the trunk would solidify through and through, trying all the while to protect and killing the tree with its obsessive kindness.
At the time when these two mosquitoes became stuck in tree sap that eventually became amber, flowering plants were beginning to spread for the first time.
And just like blood circulates in the human body, trees are designed to circulate two kinds of sap throughout their bodies—carrying all the substances a tree's cells need to live.