Peter and rosemary grant
a. spent more than 30 years studying darwin’s tortoises.
b. studied the migration of the camel.
c. actually observed evolution by natural selection taking place.
d. all of the above

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.