Cause best preserved fossil specimens found anywhere in the world of the lobe-finned fishes that gave rise to the first four legged
<span>During the industrialization of the United States in the 19th century, immigrants were housed in old houses or warehouses, which were bought and divided to be distributed among the families. These buildings did not meet all living standards completely, for example they were very hazardous in the case of a fire, but they were enough for the families trying to earn a living for themselves. These low-cost dwellings were referred to as tenements.</span>