Fibrosis and the resulting scar tissue happen when an injury doesn’t heal properly. It is a major cause of muscle weakness and a hallmark of aging, severe chronic muscle injuries, and muscular dystrophy diseases. Fibrosis prevents muscle regeneration after injury and increases the risk of re-injury.
Domestic cats make different sounds than their wild ancestors, suggesting that they have evolved to get our attention
Anyone who’s lived with a cat knows that there’s no “one-size-fits-all” meow. Rather, a cat has a diverse meow-cabulary, with different sounds used in different situations. Other animals have similar vocal repertoires. Dogs vary their barks, and monkeys have different alarm calls for different predators.