What happens with a build up of lactic acid

How do you date a sample of rock that you suspect as being one of the earliest on earth

Which is the most likely reason the writer of the play pygmalion chose to change the character of galatea from a statue to working-class woman?

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above