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Faith Versus Scientific Evidence: Did Whales Evolve?

Thu, 11 Nov 2010 Source: kwaku ba

In the six day creation account of Genesis chapter 1, on the fifth day god created

all the animals in the oceans including whales, as well as the birds of the air. On

the sixth day He created the beasts of the earth such as the cattle and all those

that creepeth on the surface of the earth. But is this account true and accurate?

How can we test its veracity? Or how can it be falsified by those who have doubts

about the accuracy of the biblical creation accounts? In this article we shall

specifically look at the whale and test the claims of the bible as to whether this

animal indeed came into existence before land animals or not. The whale is also

mentioned in a key defining story of the Judeo-Christian faiths involving Jonah, in

which he is swallowed by a big fish ostensibly a whale, and vomited out three days

later. Can such claims be supported scientifically?. This article shall present some

of the evidence for the origin and development of the whale.

The first point that needs to be addressed is what is a whale? Is it a fish? The

answer is no. A whale is a mammal just like you and I. Whales give birth to live

babies after a year long pregnancy, they breastfeed their young. Whales have all the

bones that any tetrapod (four legged animal) has including vertebral column, pelvis,

leg and arm bones, smaller bones as in the wrists and digits (fingers etc). Yes

whales have legs, but the bones are internal. Whales have lungs and breath air

through their nostrils as we humans do, they must come to the surface to breath and

hold their breadth while under water. In other words whales can actually drown,

unlike fish who take in oxygen directly from the water through their gills. Like

humans whales maintain a constant body temperature, humans do this by sweating when

too hot and shivering when too cold. Dogs maintain their body temperature by panting

through the mouth. Whales have evolved their own unique method. Fish on the other

hand are cold blooded in other words they cannot maintain a constant body

temperature so when their environment becomes too cold they become inactive and

lethargic. So the conclusion is that a whale is not a fish, it is a mammal. A mammal

that lives permanently in water. It turns out that they are not the only ones. The

class of mammals that live permanently in the water are called the Cetaceans. This

group includes dolphin, orca (killer whale), manatee, porpoise, and up to 80

different species of whales, some now extinct.

The first simple test we can do to support or refute the hypothesis that whales

predate land animals is from the geological record of the remains of dead and

extinct species known as fossils. If whales predate land animals we should see

whale fossils in older geological rock formations than that of land animals. Is

this the case? So far fossils overwhelmingly show that the first land mammals date

from 265 million years ago and were a contemporary of the early dinosaurs, whereas

the oldest whale fossils are from around 40 million years ago, when the dinosaurs

were no more. The names of some of the first mammal species include Morganucodon

watsoni whose fossils have been found in Britain, China and South Africa, and

Gondwanadon tapani which was found in India. The evidence suggests these first

mammal species evolved from reptiles. So we can now answer the question, were

whales created before land animals as the bible says? No. The bible claim is false

and not supported by any evidence. So if whales are younger than land mammals as a

species, where did they come from , and why is this the case? The logical

hypothesis is that whales therefore evolved from an existing land mammal that

adapted over several million years due to environmental or other evolutionary

pressures. But how do we test this hypothesis? What is the evidence that whales

evolved from a land mammal? Once again the fossil record can be our first arena for

tackling this question.

In 1978 Philip Gingerich of the University of Michigan on an expedition to the

Sulaiman Mountains in Pakistan found the remains of an unknown hoofed wolf life land

mammal. On closer inspection the specimen had a unique ear bone found in only one

species on earth today. Yes, the whale. He named it Pakicetus, meaning whale of

Pakistan. This was a direct missing link in the evolution of whales and began an

intense effort to unravel the mystery of whale evolution. However after 50 million

years Pakicetus vanishes from the fossil record. What happened to it? Did it simply

go extinct or did it evolve into a new species? In 1984 one of Dr Gingerich?s former

student s named Hans Thewissen went back to Pakistan and later unearthed another

fossil dating 49 million years. This creature looked very much like Pakicetus but

had broader and flattened tail, as well as more powerful feet for swimming, it also

had a more slender and streamlined body. It was named Ambulocetus natans meaning the

walking and swimming whale. Like all other whale species it had the unique ear bone

called the sigmoid process. Pakicetus had evolved into Ambulocetus. Thewissen later

uncovered he remains of another land based whale ancestor in India that predated

Pakicetus. He named it Indohyus. It was a small deer like creature. As of this date

it is unclear whether the common ancestor of all Cetaceans is Pakicetus or Indohyus,

but they remain the two strongest candidates and research is on going. It took

another 15 million years for whales to evolve into the forms we are familiar with

today. It must be noted tests confirm that Ambulocetus was unable to drink sea

water. This means it would have to come out of the sea to drink fresh water. So

Ambulocetus was not a permanent marine animal. So which whale ancestor was the first

to live permanently in the sea? From Ambulocetus, the current known evolutionary

history of the whale can be summarized by some the following intermediate species.

Rhodocetus: This was the first whale ancestor to live permanently in the sea. This

species developed key adaptations to do so. One of those was the kidney which could

now filter salt from the blood which was then excreted in the urine. This enabled

Rhodocetus to drink sea water and unlike its predecessors it did not have to come

out of the sea and onto the land to drink freshwater. This means that the previous

species would not have lived too far from the coast, whereas this species could live

far out in the deep sea. This species also shows a reduction in the size of the

inner ear, this adaptation resulted in a remarkable improvement in the sense of

balance. As a result this four-legged animal could now swim and dive, turn and twist

and high speed without getting disorientated. This adaptation enabled it to evade

predators and swim at high speed.

Dorudon: This species is the first to live in groups or pods as they are known.

This is a behavior that continues to this day. Whales, dolphins etc all live in

groups and hunt in groups, and care for their young together. Each group has female

leader who determines where they will go to find food etc. Males live independently

on the fringes of the group and do not interact directly with the other group

members unless during mating season. This whale ancestor is the first to exhibit

this behavior.

Basilosaurus: This was an extremely large whale species weighing in at 6300 kilos.

It was a predatory species that branched off the main whale ancestral line.

Specimens have been found all over North Africa and even in the Sahara desert

proving that the Sahara was once part of a lush swampy environment and later part of

the Mediterranean sea which shrunk to its current size due to climate change.

However due to its enormous size and food requirements, climate change at around 35

million years ago resulted in the extinction of this species. It was the Dorudon

whale that continued on and spawned the common ancestor of Cetaceans as we know them

today.

Odontocetes: Whales communicate with one another by sonar. They do this by making a

clicking sound and with their teeth and wait for the echo to locate another whale or

a food source. This behavior is first seen in the Odontocetes. The species also

shows features enabling it to dive over a mille deep and hold its breath for over

two hours. Other whale ancestor include Protocetus, Kutchicetus, Aeitocetus,

Squalodon and many others

If we were to put the skulls of all the whale species so far, side by side in

chronological order we would notice a migration of the nostril from the front of the

head towards the back to form the famous blow hole through which modern whales

breath when they come up to the surface. We will also see the successive shrinking

of the limbs particularly the hind limbs from that of a four-legged animal in

ancestors such as Pakicetus, to the small limbs that are now internal to the body as

in modern whales. Whale evolution has so far provided some of the best demonstrable

and teachable evidence for evolution. The large number of well preserved fossils

found enables us to see in living color how features change over time to produce new

species. This is one species where you can actually line up the fossils and see the

smooth transitions over time from the original land based ancestors to the current

forms and diversity . Whales did not turn into fish. Inside every flipper is found

the bones of the mammalian hand. They swim like otters by undulating the mammalian

spine. The tail fluke is not a fish fin. Evolution works by modifying existing body

plans to fit new conditions of life, and is often constrained by developmental

pathways. No longer limited by gravity and strength of bones, evolution enabled

whales to become giants of the sea. The evolution of other cetaceans such the

dolphin have been well documented and readers are encouraged to look up and review

the material.

Around 24 years after Charles Darwin presented his theory of natural selection, a

fellow Victorian scientist named William Flower trained this powerful new idea on

one of the toughest problems in zoology: the whale. Natural historians had long

before recognized that whales are mammals, but that was about as far as they had

come in understanding the origins of cetaceans. In 1883, Flower , after careful

study posited that whales had evolved from mammals known as ungulates, a group whose

best-known characteristic is a set of hoofed feet. In other words, dolphins,

porpoises, humpbacks, orcas, and all other whales are close kin of cows, horses,

pigs, etc. Today dozens of scientific studies have demonstrated that cetaceans are

indeed the descendants of hoofed mammals. In the era of DNA testing and the

sequencing of the entire genomes of organisms we can put the evolutionary theory to

the test by actually testing the DNA of a whale and by comparing with other species

we can tell which ones it shares common ancestry with. . This testing was done by

Ursing and Arnason in Sweden in 1998. It turns out that whales closest relatives are

the pig and the hippopotamus which all share a common ancestor. The DNA shows that

the whale ancestor split from this common ancestor around 54 million years ago.

Again the evolutionary theory explanation of the development of the whale obtained

from the fossil record was accurately confirmed by DNA testing. So as usual science

in this case evolution makes a prediction which can be independently tested and

confirmed or falsified. Science wins, and even if not we are pointed in the right

direction to make the necessary corrections to our knowledge and make improvements.

Sadly no religious claim has ever stood up to such scrutiny and yet religion claims

it knows everything. Some even sacrificing their lives in the faith that their

religious rewards are waiting for them in another reality generally called the

afterlife. A place that so far has not been demonstrated to exist except as the

figment of human imagination.

So at this juncture we may pause to ask, is the biblical claim that whales were

created before land animals true and accurate? No, according to the fossil and

geological evidence land animals came first and later one of them evolved into the

whale. Also by DNA test we can easily see that the whale ancestor shared a common

ancestor with pigs and hippos. The biblical account is not true. So we shall now

turn it over to the religionists and creationists to explain to us why their god

inspired book is telling lies and spearheading falsehood, claiming it knows when it

has no clue. Was this pseudo science written by an omniscient god or was it written

on his behalf by illiterate barbarian ancient men who did not know what they were

talking about? And why did God not simply step in and correct his book for the

record instead of allowing it to continuously teach false teachings?

kwaku ba, November 2010

Source: kwaku ba