41.   One day scientists may learn that apples are a storehouse of micronutrients that make them a worthy competitor of the cantaloupe.

42.   Over the years, scientists have learned that not all breast cancer acts alike.

43.   Over the years, scientists have learned that A beta is a small piece of a much larger protein that protrudes from cells.

44.   Rep. Jerrold Nadler, D-N.Y., argued Monday that human cloning for medical research must go forward so scientists can learn how to cure diseases.

45.   Recently, scientists have learned that each neurotransmitter has a number of receptor subtypes that carry different messages into cells.

46.   Scientists also will learn something about the Martian dust by seeing how far into the surface both the lander and the rover sink.

47.   Scientists are learning to interpret these distorting and magnifying lensing events for revealing clues in the most intractable mysteries of the universe.

48.   Scientists can also learn the function of a human gene by comparing its genetic message with one in yeast whose function has been previously described.

49.   Scientists had learned that high levels of cholesterol helped bring on atherosclerosis, and that animal fats helped raise cholesterol levels.

50.   Scientists have also learned that during a stroke, the brain releases massive quantities of nitric oxide, which greatly increases damage to the neural tissue.