Vaccination and smallpox are intricately linked. Smallpox is a severe, contagious, disfiguring, and often fatal disease that affected the human population for thousands of years. It caused 300 million deaths globally by the 20th century. Thanks to Edward Jenner, who developed the first smallpox vaccine, the disease’s spread was prevented. It led … Read more
About 71 percent of the Earth is water. It comes in many forms: ocean, seas, rivers, lakes, and water from underground. Water is a fundamental element needed of all living organisms in the Planet. It is even believed to where life has originated in the aqueous solutions of the world’s oceans. Water … Read more
One of the most fundamental ways in which we interact with our surroundings and get to know the world around us is by making use of sounds. Sounds are essential in helping us communicate in the most effective way possible. Sounds play just as important a role in helping us interpret our … Read more
A species of tree known as the carob grows in the coastal areas of Mediterranean Sea (e.g. in Egypt, Libya, Tunisia, France, and Spain). It reaches a height of about 15 meters and bears about 30 centimeter- long ponds. Each pod contains five to fifteen seeds which are flat and hard like … Read more
The lenses of photochromic lenses are made of glass that is mixed with minute crystals of light-sensitive silver iodide or bromide. The crystals are so tiny that they have a length of only 50 angstroms, and to make its length clearer, a single angstrom is equivalent to 0.0000000001 meters. As these crystals … Read more
Nobody wants to get sick because nobody wants to take any medicines, whether a syrup, a tablet, or a capsule form of medicine. And much more, no one wants to be at the ER. However, although we are not sick, we sometimes need to take vitamins or other supplements to help us … Read more
The ink used for ballpoint pens and fountain pens vary in ingredients. Some ink manufacturers would use natural dye created from plant roots such as logwood and other types of leaves, berries, roots, or barks. However, most of the ink that we currently use is made of synthetic ingredients, which are derived … Read more
What could possibly happen if there was no hole in the middle of the parachute to let some of the air escape? The problems for hole-less parachutes were prominent during the First World War when paratroopers would use parachutes without holes and consequently faced two serious risks. The first risk arose when … Read more