Forearm crutches, also known as Canadian or Lofstrand crutches (Figure 7), are used for patients requiring bilateral upper-extremity support with occasional weight bearing. An advantage of forearm crutches is that they allow the hands to be free without disengaging the crutch from the forearm.
10-animal cloning. Dolly the sheep was the first animal to be cloned from the cell of an adult animal. http://www.ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml.
These early mammals were small, insectivorous, nocturnal, hairy and warm-blooded. Warm-bloodedness is believed to have first evolved among the cynodonts, a late but successful group of mammal-like reptiles from which the mammals evolved. The cynodonts were the only mammal-like reptiles to survive to the Jurassic, in fact they nearly made it into the Cretaceous, and definitely coexisted with many of the major dinosaurs.