This blog is about everything and anything. Every day we find out something new and want to share our new knowledge with you so that you can say: "Oh really? I never knew that". Just like we did.
Thirst sensation is the early symptom of dehydration that arises from a lack of fluids and/or increase in the content of certain osmolites such as salt in our body.
In most people dehydration symptoms become noticeable after 2% loss of one’s normal water volume and in addition to thirst may include dry skin, abnormally dark urine, tiredness and headache. 10% to 15% loss of water may result in dim vision, muscle cramps, dizziness. Water losses that exceed 15% are usually fatal.
In adults over age of 50, the thirst sensation diminishes. In a study elderly people were withheld from drinking water for 24 hours, and when in 24 hours water was made available to them, they still did not recognize that they were thirsty.
The first credit cards were issued in the United States in the 1920s by oil companies and hotel chains, and the purpose of these first cards was not the convenience, but to build customer loyalty.
Before plastic era the credit cards (or credit tokens) were made of metal coins or plates, celluloid, cardboard.
The first bank credit card named Charg-It was invented in 1946 by a Brooklyn banker. Unlike today’s cards allowing for purchases with countless third parties all over the world, Charg-It was based on the program between bank customers and local merchants only.
Most of the turkey feathers produced by the poultry industry are ground up and used as filler for animal feed. Turkey dung is used as a fuel source in special electric power plants.
Brussels sprouts were brought to the US Louisiana by French settlers around 1800. Today about 80% of Brussels sprouts grown in the US goes to the frozen food market.
Parsnip is harvested through winter when the ground freezes over as it needs frost to develop its flavor.
Today, China is the world’s largest producer of potato, while Belarus is the largest consumer of this crop with estimated 180 kg per person, almost half a kilo a day.
Spiders are not insects, but air-breathing arthropods with two body segments and eight legs. So far, about 40,000 species have been discovered, with the smallest one, dwarf spider, being less than 1 mm (about .05’’) in body length, and the largest one, tarantula, with body lengths up to 90 mm (about 3.5’’). In captivity tarantulas can live up to 25 years, but lifespan of most species does not exceed 2 years.
Spiders are predators preying mostly on insects and other spiders, but some large species eat birds and lizards. Spiders have a very narrow gut that can’t cope with solid matter, and because of that they liquidize their food with enzymes.
Teeth are made not of a bone, but of four tissues of different density and hardness: enamel (the hardest substance of human body), dentin, cementum, and dental pulp.
Humans (and mammals in general) are diphyodont, i.e. they develop two sets of teeth during the lifetime: 20 milk teeth and 32 permanent ones. The presence of a higher-than-normal number of teeth is called hyperdontia.
Some animals have more than one set of teeth in their lifetime. For instance, sharks grow a new set of teeth every two weeks. And walrus tusks are canine teeth that never stop growing throughout life.
Caries is one of the most common diseases throughout the world. It is caused by acid-producing bacteria that live off the remains of foods, especially sugars and starches. To prevent tooth decay saliva helps neutralize the acids that increase the pH of the tooth surface.
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