Bunostegos akokanensis is Earliest Known Creature to Walk Upright on All Fours

Bunostegos akokanensis – a Permian cow-sized, herbivorous reptile with a knobby skull and bony armor down its back – is the oldest known creature to have walked upright on all fours, according to a team of paleontologists led by Prof. Christian Sidor of the University of Washington, Seattle. Bunostegos akokanensis belongs to Pareiasauria (pareiasaurs), a [...] —> Read More