Species separated by inability of hybrid offspring to produce offspring of their own

Reproductive organ incompatibility keeps the species reproductively isolated. ... In another postzygotic situation, reproduction leads to the birth and growth of a hybrid that is sterile and unable to reproduce offspring of their own; this is called hybrid sterility.

Glomar challenger was a deep sea research and scientific drilling vessel for oceanography and marine geology studies. the drillship was designed by global marine inc

Ifound this on google “according to the findings, a foramen magnum positioned toward the base of the skull is found not only in humans, but in other habitually bipedal mammals as well.” i hope this you for what your looking for