https://awionline.org/content/wild-horses-native-north-american-wildlife
An excerpt:
” A study conducted at the Ancient Biomolecules Centre of Oxford University (Weinstock et al. 2005) also corroborates the conclusions of Forstén (1992). Despite a great deal of variability in the size of the Pleistocene equids from differing locations (mostly ecomorphotypes), the DNA evidence strongly suggests that all of the large and small caballine samples belonged to the same species. The author states, “The presence of a morphologically variable caballine species widely distributed both north and south of the North American ice sheets raises the tantalizing possibility that, in spite of many taxa named on morphological grounds, most or even all North American caballines were members of the same species.” “
Reality is Dharma 