 A BBC2 and NOVA in The Family That Walks on All Fours  reported on the Ulas family in which five individuals grew up walking normally upon the palms of their hands and fully extended legs due to a recessive genetic mutation that causes a non-progressive congenital cerebellar ataxia that impairs the balance needed for bipedality.
<clarity>  A BBC2 and NOVA in The Family That Walks on All Fours  reported on the Ulas family in which five individuals grew up walking normally upon the palms of their hands and fully extended legs due to a recessive genetic mutation that causes a non-progressive congenital cerebellar ataxia that impairs the balance needed for bipedality.
 A BBC2 and NOVA episode, " The Family That Walks on All Fours reported on the Ulas family in which five individuals grew up walking normally upon the palms of their hands and fully extended legs due to a recessive genetic mutation that causes a non-progressive congenital cerebellar ataxia that impairs the balance needed for bipedality.