Well grab the nearest cat and hold it tight, for it may just hold the answer to anyone fearing brittle-bones. Most people find the sight of a purring cat reclining on a warm lap to be the picture of contentment and little else. But US researchers have found that purring helps to heal many ills,- including bone damage, which may explain why they can survive falls from up to 45 storeys high. Many varieties of felines, including small domestic cats, feral cats and even larger species such as lions and cheetah purr. Many scientists have assumed that cats simply purred when content, which they do, but it has never been known exactly why.
Natural selection ensures that a particular trait be advantageous to an animal.
However, the team have been able to find some possible reasons for the feline hanging onto its purr throughout the ages. The scientists at FCRI discovered that the frequency at which a purr occurs corresponds with some positive health benefits for both humans and their feline friends. They found purring is a form of natural healing that cats employ, which may explain why they supposedly have nine lives. Larger cats such as pumas were found to have a frequency of between 20 and 50 hertz. These frequencies fall directly within the same range that are found to strengthen human bones and help them grow.