Page 213 - The Transitional Form Dilemma

Millions of years ago, just as is
the case today, there lived millions of dif-
ferent species. Over hundreds of millions of
years, the Earth has been teeming with living
things, from trilobites—with their complex eye struc-
tures, which adorned the sea bed 550 million years ago—
to starfish, from present-day fish to sweet-smelling flowers,
lions, rabbits, brightly colored birds, horses, squirrels, dol-
phins, butterflies and dragonflies, from sparrows to lambs,
from ants to human beings. Some of these became extinct,
and others survived down to our present
day.
As you have seen throughout this
book, all these creatures appeared
suddenly on Earth and