The decomposition of bones is a complex process influenced by various factors such as environmental conditions, temperature, humidity, and the presence of scavengers. Under normal circumstances, bones decompose at a slower rate compared to soft tissues.
In general, the complete decomposition of bones can take several years to several decades. However, it's important to note that bones are composed of a mineralized matrix, primarily hydroxyapatite, which is more resistant to decomposition compared to organic materials. Therefore, bones can persist for much longer periods of time than soft tissues.
In certain environments, such as extreme heat or acidic conditions, bones can decompose at a faster rate. Conversely, in cold or dry environments, the decomposition process can be significantly slowed down.
It's worth mentioning that the decomposition rate of bones can also be influenced by external factors, such as burial conditions and the presence of microorganisms that aid in the decomposition process.