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.
Repenomamus The only early mammal known to have hunted dinosaurs. Rugosodon The earliest multituberculate yet identified. Sinoconodon Another intermediate form between reptiles and mammals. Sinodelphys One of the earliest marsupials yet discovered.ozostrodon This Triassic critter may (or may not) have been the first true mammal. Fruitafossor The earliest digging mammal yet discovered. Hadrocodium This tiny mammal had an unusually large brain. Juramaia The earliest known placental mammal in the fossil record.