Scientists Discover Why Persistent Arm Itches Often Peak At Night

For decades scientists believed in the (i) _____________ of long-term memories; they were unstable for a few hours but then became etched into the brain for good. Scientists could not build on each other's work if they could not trust the published work of their colleagues; thus progress in science depends on the ____________ of practicing scientists. A. senior scientists in industry have been less likely than junior scientists to remain in positions where opportunities to conduct their own research are restricted B. scientists who work in industry can gain. A. can be used by scientists to determine the duration of an event B. causes mass extinctions in a short period C. gathers excessively in clay deposits D. helps scientists determine the orientation of the. Scientists have long debated the exact timing of the lunar cataclysm, a period approximately 4 billion years ago when Earth and the Moon were pummeled with asteroids. A clue to this puzzle may come.