A
fter taking a journey through geologic time, we can better appreci-
ate the wide variety of life on Earth today. However, as shown here,
species have been struck down several times in Earth history by
extinction.
Life then bounded back with greater diversity, so that today’s world is
filled with a vast array of species far more abundant than has ever existed
before. A tremendous shame would be upon us if we should destroy nature’s
bounty by despoiling the habitats of all creatures great and small.
CONCLUSION