layer

They form when waterlogged soils accumulate layers of dead vegetation over thousands of years.

"But IgG antibodies never cross the cell layers and they can never make it inside the cysts."

Fluorescent microplastics used in the study were found inside plaques and concentrated within the endothelial layer, consistent with reports from human samples that have revealed microplastics in arterial lesions.

By examining their yearly growth layers, similar to tree rings, scientists can reconstruct changes in ocean chemistry over centuries.

Remove any hats, gloves and extra layers when you come back inside.