The bark was stretched over frames made from tree branches, stitched together and sealed with resin—you know that the sticky liquid that comes out of the tree—and when it dries, it's watertight.

Initially the amyloid appears as a long protein that is then cut by enzymes into shorter fragments that become molecularly sticky and clump together, forming a plaque.

Neuroscientists used to think glia were simply the sticky stuff that holds neurons together.