cleverdevice2 Dec 2002

Actually I have just thought, are knees defined by knee-caps? Or just the joint between femur and the tibia and fibula? Obviously knees depend on the back legs so your picture is inconclusive. Can you find a picture of an elephants back legs? If you visit www.talkorigins.org/faqs/sauropods-structural.html#limbs I think you can actually quite clearly make out the patella, or the knee cap bone. In conclusion, I would now say that although elephants have knee-caps, they still cannot jump because of the sheer mass these wonderful beasts have.