Lanthanides and actinides are two families that contain 14 chemical elements each, as well as the metals themselves - lanthanum and actinium. Their properties - both physical and chemical - will be considered by us in this paper
It is known that the human spine consists of thirty-four vertebrae, five of which belong to the lumbar region, seven to the cervical, twelve to the thoracic, five each to the sacral and coccygeal regions. Changes taking place with the earth's climate (in particular, its warming in the future) can contribute to the fact that the body and head of a person will be more elongated, the spine will be thicker with the sacrum fused with the lumbar region. But these are hypothetical realities of future millennia