Which tool making technique was once believed to be no older than 20,000 years until recent discoveries at blombos cave, south africa that date this technique at 75,000 years ago?
(a) direct percussion
(b) indirect percussion
(c) percussion flaking
(d) pressure flaking
(e) indirect lithic crushing

D. Pressure flaking

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.