Lesser kudu kudu and nyala form a clade, and collectively separated from the sister clade 13.8 million years ago. The lesser kudu has 38 diploid chromosomes. However, unlike others in the subfamily Tragelaphinae, the X chromosome and Y chromosome are compound and each is fused with one of two identical autosomes. The lesser kudu is a spiral-horned antelope. The head-and-body length is typically between . Males reach about at the shoulder, while females reach . Males typically weigh and females . The bushy tail is long, white underneath and with a black tip at the end. Distinct signs of sexual dimorphism are
Rational animal in the Arbor Porphyriana, man is a substance, corporeal, living, sentient, and rational". In Meditation II of "Meditations on First Philosophy", Descartes arrives at his famous "I think, I exist" claim. He then goes on to wonder "What am I?" He considers and rejects the scholastic concept of the "rational animal": Shall I say 'a rational animal'? No; for then I should have to inquire what an animal is, what rationality is, and in this one question would lead me down the slope to other harder ones. Freud was as aware as any of the irrational forces at work in