The circumference of the earth is almost 25,000 miles. but in the first few decades of the 20th century this great distance was reduced from a journey of many months to one of a few days. Thus the …
Since the dim and shadowy ages when man first made his appearance on the earth, he has evolved into a creature possessing abilities never attained by any other living organism. The pages of history…
Man has long been interested in the wonderful world of life. For one thing, man himself is a living thing and as such is part of the whole complex of life on the earth. His life is intricately inte…
Agriculture and industry are the practical framework of modern society. Since the dawn of history man has always been dependent on agriculture to provide him with the food he needs to subsist. For …