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Evolution & The
Time Machine
A Look at How it All
Point 1: Science deals with the
physical laws of nature (not spiritual)
 This means that science cannot solve all
 Science answers the how—not the why
 It cannot answer the questions that
depend on opinion, belief, or judgment
 What is a “Theory”—well tested
explanation that unifies a broad range of
Point 2: The idea of evoultion
began more than 2000 years ago
 The Greek philosopher Empedocles was
the first to write down his observation that
the world was in a state of gradual
development affecting living and non-living
 The term “evolution” comes from a Latin
word meaning the unrolling of a scroll
 Jean Baptiste Lamark coined the term (as
we use it today) in the early 1880s
Point 2: The idea of evoultion
began more than 2000 years ago
 In the mid-late 1800s, both Charles Darwin
and Alfred Russel Wallace independently
developed the Theory of Natural Selection,
based upon experiments and
observations, as a mechanism to explain
 Today, a simple definition of evolution is a
change that occurs in a population over
many generations
Point 3: Theory of Natural Selection
 All organisms vary in their characteristics
 Organisms in nature produce more offspring
than can possibly survive
 Organisms always struggle for food, habitat,
protection, and mates
 On average, offspring that vary in ways favoured
by the environment will survive better and
produce more offspring of their own (biologically
successful)—favourable characteristics will thus
accumulate in the population over time
Point 3:
Point 4: Implications of Natural
 1: Populations evolve, individuals do
 2: Evolution has no purpose other
than to increase success
 3: Evolution is not “headed” anywhere
in particular (no direction)
Part 5: Evidence for Evolution
 Fossils of extinct creatures are the best
evidence for change
 The fossil record allows us to reconstruct
evolutionary history with confidence
 The DNA of organisms that seem to be
related is similar
 Homologous and vestigial organs—no
other good reason for them to exist
Point 5:
 Homologous—
organs and
structure are the
same but have
Point 5: Continued (Vestigial)
 Whale: pelvis/femur/ischium = bones
needed for walking
 Python: femur/illium = bones needed for
 Human: wisdom teeth, appendix,
rudimentary tail muscles (Shallow Hal)
Point 5: Continued—We can watch
it happen
 Natural Selection
 Darwin’s Finches
 Artificial Selection
 Bacteria and antibiotics (antibiotic resistant
 Insects (insecticide/pesticide resistance)
 Domestic animals (grey wolf and dogs)
Point 5: Continued—We can watch
it happen
Point 6: No, humans have not
evolved directly from apes
 Darwin said humans and apes evolved
from a common distant ancestor
 This split occurred 4-5 m.y.a.
 Today, our closest cousin is the
Point 7: Religious viewpoint
 Many people accept evolution as being
controlled by divine guidance
 Pope John Paul II accepted evolution as a
plausible theory
Point 8: Evolution & The Time
 Wells is suggesting a split or branching of
 One branch went underground—over time
they evolved into the creature known as
Morlocks (loss of pigmentation, eyes don’t
do well in light)
 One branch remained above ground—
over time they evolved into the creatures
known as Eloi (loss of ability to think or
fend for themselves
Point 8: Evolution & The Time
 Using what we have just learned—how
could this evolution have occurred in the
human race?
 Take five minutes, and respond to that
question. If you are not 100% sure, then
give a logical guess.