• Did you know that while it's in flight, the sparrow's heart can beat up to 760 times per minute?
• Or that a baby blue whale grows at a rate of 3.3 kg an hour while it's nursing and reaches a grand total of 17 tons by the end of the nursing stage?
• Did you know that glow worms have a light output efficiency of 100% as compared to only 4% for our incandescent bulbs?

Dr. Werner Gitt covers these and many other fascinating facts from the animal kingdom.

Interest level: Junior High-Adult
Paperback:115 Pages