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Definition: Land Bridge
A land bridge is defined as a wider are of land connecting two separate areas of land and allows the movement possible from one landmass to another. A land bridge can be created or destroyed by the occurrence of natural phenomenon. It can be created when sea levels fall exposing the previously submerged land or can be formed by the collision of tectonic plates. Similarly, a land bridge can be destroyed by rising sea levels and submerging the land on surface.
Bering land bridge which connected Asia and North America.
A lot of Scientists discovered surprising similarities between the widely separated areas. By studying the fossil records, they were able to deduce that the land bridges used to exist between these far off places. This is known as Land Bridge Theory.