What did the mass extinction at the end of the Permian period lead to??

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate

`stare decisis is a legal doctrine that obligates courts to follow historical cases when making a ruling on a similar current or future case. stare decisis ensures that cases with identical facts be approached in the same way, unless overruled by the same court or a higher court such as the us supreme court. simply put, it binds courts to follow legal precedents set by previous decisions.

stare decisis is a latin term meaning "to stand by that which is decided".