Mobility aids help you walk or move from place to place if you are disabled or have an injury. You may need a walker or cane if you are at risk of falling. If you need to keep your body weight off your foot, ankle or knee, you may need crutches. You may need a wheelchair or a scooter if an injury or disease has left you unable to walk. Choosing these devices takes time and research. You should be fitted for crutches, canes and walkers. If they fit, these devices give you support, but if they don't fit, they can be uncomfortable and unsafe.
Primate-like Mammals. The first primate-like mammals, or proto-primates , evolved in the early Paleocene Epoch (65.5-55.8 million years ago) at the beginning of the Cenozoic Era. They were roughly similar to squirrels and tree shrews in size and appearance.
An early close primate relative known from abundant remains is the Late Paleocene Plesiadapis, circa 55â58 million years old. Molecular clock studies suggest that the primate branch may be even older, originating near the CretaceousâPaleogene boundary or around 63-74 mya.