He formulated a hypothesis for the process of land formation;based on his observation of fossil shells in a geological stratum in a mountain hundreds of miles from the ocean, he inferred that the land was formed by erosion of the mountains and by deposition of silt.
Just like the rest of our skin, the lips are made up of three layers of cells: the outermost layer of mostly dead cells, known as the stratum corneum, the epidermis and the dermis, which sits below it.
The date isn't random: it matches when the first nuclear tests created a new stratum in the planet's surface.
The date isn't random: it matches when the first nuclear tests created a new stratum in the planet's surface.
