What does our cover picture
bring to your mind? Do you see it as a winter wonderland, full of
beauty and wonder; or do you see it as a pain in the neck with bad
driving, back-breaking snow shoveling, and
a general nuisance? Our situation in life from minute-to-minute can
affect how we answer that question, but the fact is that when you
look at winter and what it brings to earth and all things that live
on the earth what you see is incredible wisdom and planning.
Many of us do not understand that winter is a natural product of the
existence of the earth or any other planet orbiting a star. The
angle at which the rays of the star strike the surface of the planet
depends upon the latitude of the point in question. A latitude
perpendicular to the ray will have a very high absorption of the
energy of that ray (see A in the drawing to the right). At a higher
or lower latitude (see B or C) the angle will be lower and more of
the ray’s energy will be deflected away from the surface. That means
that the energy absorbed by the planet will be less — and that means
winter.
For a planet to sustain life, there has to be an
adaptation or accommodation of that life for the conditions that are
present. In the case of the earth, that is done primarily by the
presence of large amounts of water, and the system works because of
the design of water.
Water is a polar molecule, meaning that
it has a geometry about its molecules that allows water to form a
solid that has a lower density than its liquid state. That is the
reason ice floats. This polar molecular structure also causes water
to freeze into beautiful crystal structures, like snow flakes.
Water has a relatively high freezing point so that it forms a solid
at a temperature close to its vaporization temperature. Only 100
degrees Celsius separate water as a solid from water as a vapor at
normal atmospheric pressure, so snow forms quite easily. All at the
same time, water can exist in equilibrium as a gas, a liquid, and a
solid, a condition we call slush. Scientists refer to this as the
“triple point” of water. For most of us such information is taken
for granted, but it is critical for life to exist on this planet.
In addition to the thermodynamic properties related
to its state as a solid, water is a very poor conductor of heat. The
Psalmist stated it well when he said “He giveth snow like wool …” (Psalm 147:16). In the liquid state
this property allows lakes to have different temperatures at
different levels. Most of us have had the experience of diving into
a lake and hitting a layer of cold water, called the “thermocline,”
some depth below the surface. Fishermen know about this layer but it
can exist only because heat is not conducted
well through the water. Ice on the lake and snow on the ground also
serve as wonderful insulators because of this property. That means
lakes do not freeze to the bottom in winter, protecting fish from
being killed. It also means that the surface of the earth is
insulated by snow in winter. This protects plants and their roots as
well as storing water for the coming summer.
In many places on the planet the main source of water during the
summer months is the melting snow that stored water during the
winter and releases it gradually as the snow melts. One is reminded
of this in Psalm 147:17 –18 “He
casteth forth his ice like morsels: who can stand before his cold?
He sendeth out his word and melteth them: he causeth his wind to
blow, and the waters flow.”
For the small creatures of the
earth, this insulation not only keeps their survival rate high in
winter by keeping them warm, but they form tunnels and have a secure
environment throughout the winter season. Predators have to find
them by sound, because they are not visible as they move freely
beneath the layer of snow. (See Dandy Designs “Foxes and Magnetic
Range-finders” on page 25.)
Winter is also a time of freedom from
insects and disease which are less able to bring about their
afflictions in cold weather. While mankind may find winter a
difficult time primarily because our machines do not work as well in
the snow and ice, most animals are blessed with a positive time
during the winter months.
In this publication over the years we have discussed a variety of
ways in which animals have been equipped to deal with winter.
Hibernation, storage of food, migration, symbiotic relationships,
environmental modification, and physiological adaptation are just a
few of the many ways animals handle the cold and dark. (You can find
these articles on our doesgodexist.org website by using the
bimonthly search engine or go to dandydesigns.org and
select examples from the listing on that site). You can explain all
of these adaptations as a product of biologically driven chance, or
you can look at it as a beautiful example of the wisdom and planning
of God. We would suggest the latter better fits the variety,
complexity, and level of design we see around us. The more we know
of the creation, the closer we get to the Creator.