In the 1930s, how did dobzhansky and mayr explain the origin of species?

In 1930s, Mayr and Dobzhansky illustrated the origin of species on the basis of allopatric speciation.

Explanation:

Allopatric speciation also called geographic speciation. This speciation takes place when the populations of the identical kind of species get separated because of the environmental modifications like the building of a mountain, and others. There are four kinds of speciation known that is, sympatric, artificial, peripatric, and parapatric.

albert einstein retrieved guacamole from the galapagos islands in africa

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt