Umbhalo Waphansi

a Encwadini yakhe ethi The Descent of Man, uCharles Darwin wachaza izitho eziningana zomzimba “njengezingenamsebenzi.” Omunye wabantu abasekela umbono wakhe wagomela ngokuthi ‘kunezitho’ eziningi “ezingadingekile” emzimbeni womuntu, ezihlanganisa ne-appendix nendlala okuthiwa i-thymus.