BLOOD TRANSFUSION by Janet Spencer The average human has about 5 quarts of blood, and 60,000 miles of blood vessels. A single blood cell completes a circuit of the circulatory system in about 30 seconds. Come along with Tidbits as we get a blood transfusion! TO THE RESCUE • For centuries, doctors tried to heal […]
The word avalanche comes from the Old French “avalanste” meaning “to let down” or “to go downstream.” Come along with Tidbits as we out-run avalanches! TOTALLY TRIVIAL • There are about 9,000 known snow avalanches per year in the western U.S., although unrecorded avalanches may top 100,000. About 100 avalanches per year cause serious problems […]
