This lunar origin hypothesis has some difficulties that have yet to be fully resolved.

Most current Genetic anthropology and archaeological evidence supports a recent single origin hypothesis of modern humans in East Africa.

Molecular phylogeny and biogeography of the native rodents of Madagascar (Muridae, Nesomyinae): a test of the single origin hypothesis.

The marine origin hypothesis received new impetus with the discovery in the 1990s of basal snakes with vestigial limbs in marine sediments in Lebanon.

The precise reason for the ripples remains unknown, with two considered origin hypotheses relating them to relatively dense portions of either ejected or impacted gas.

(see also Frigg and Freyja origin hypothesis)

Recently, the discovery of Najash rionegrina, a fossorial snake from South America cast doubt on the marine origin hypothesis.

The Chinese origin hypothesis for the Baijini has been recently popularized by the American journalist Louise Levathes.

According to the recent single origin hypothesis, human ancestors originated in Africa, and eventually made their way out to the rest of the world.

According to the recent single origin hypothesis, anatomically modern humans arose in East Africa approximately 200,000 years ago.