The world is an amazing place, and is highly unlikely to have developed to this point by pure chance. Science can explain many of the processes in our world, so let’s have a look at some amazing things that all exist together and you can decide why you think all this came about. Hopefully you will feel some reassurance that all this is more than a coincidence, and so feel some confidence that you have a life that continues on. You may feel they are many things to feel thankful for too.
Examples for Reassurance:
Plants are important for all living things on the planet.
The sun is the ultimate source of energy. This is the food of green plants, along with carbon dioxide and water. Plants release oxygen, which animals and humans need to breathe. Animals and humans also eat plants, which gives them energy to survive.
Without plants there wouldn’t be the oxygen we need to breathe, or the energy needed in our food web.
The Water Cycle
We need water to survive, not just to drink, but also to water plants (see above). Only 1% of the water on our planet is freshwater, accessible as lakes, rivers, or rain. The water cycle process ensures this water is available to us.
Water is naturally recycled by the sun heating water on earth and the vapour rises into clouds. This then condenses and forms what we see as clouds. When the clouds get heavy with moisture this falls back to earth as rain or snow.
The sun’s surface is 10,000 degrees Fahrenheit and we are 93 million miles away from it – just the right distance. If the earth’s temperature was 50 degrees hotter or colder all life would cease.
We rotate 365 times in a year as we pass around the sun. Suppose we only rotated 36 times? Well, our days and nights would be ten times longer. We would be terribly hot on one side, unbearably cold on the other, and life as we know it would cease
Oxygen constitutes 21% of our atmosphere: the precise balance of air we need to breathe. Why not 50%? Because the first time somebody lit a match we would all be toast! So ask yourself, is the 21% by accident or design?
The Human Body
The eye in humans and many land mammals has a “tear film”, meaning our eyes are kept moist in order to keep working. This moisture is created by our bodies, and no external moisture is needed. Blinking renews this tear film and the process itself distributes tear fluid evenly over the eye. The eye is made in such a way that we can see the world around us; it has lids to protect our eyes; the “used” tear film (which may have dust, etc.) drains away from the eye between each blink. We do this without thinking of it, despite the muscles that help your eyes focus moving about 100,000 times per day.
Our body needs oxygen to function, and a waste product of our body’s working is carbon dioxide, which needs to be removed. We breathe automatically at least 25,000 times a day, but we do this without having to think about it. Our lungs are sized so that we can take in the oxygen we need and expel the carbon dioxide waste product. To protect our lungs, they are protected by our skeleton rib cage.
To move the oxygen around the body it travels in our blood. This is pumped around our body due to the pulsing of the heart muscle. The heart beats about 100,000 times every day, but this can change depending on what we’re doing. Your muscles need more oxygen when they are active, and so your heart beats quicker. If you are exercising you will breath deeper and quicker to fill your lungs more too.
Our skeleton itself is constantly regenerating. Every year the adult skeleton repairs and replaces 10% of its blood vessels and nerves, to keep our skeleton healthy. Our skeleton is strong but also light. Bone strength can be regained even after weeks of not being used, for example if recovering from a bone break.
Our body needs a particular temperature range to work. The body can make adjustments automatically to keep it within this range. Blood vessels dilate to allow heat to escape and so cool us down. Or sweat glands tighten and muscles shiver to warm us up.
We need food for nutrients and energy, but without saliva we wouldn’t be able to swallow food. It also helps us taste the food, and it has enzymes that helps fight infections (a reason why some animals lick their wounds). When you swallow the food, a soft palate covers the route to the nose so the food is directed down. The route to the lungs also closes, so the food goes to the stomach rather than towards the lungs.
To break down the food we eat to get the nutrients out, our stomach uses hydrochloric acid – a very strong acid. To stop the acid breaking down the stomach itself and causing damage to our body, the stomach’s lining is regenerated every few days to keep it strong.
If our skin is cut, we bleed to help cleanse the wound. Our blood then clots to stop this blood flow. White blood cells kill bacteria that may have entered our body, and our skin repairs itself.
For more examples of the amazing, check out this site