The Great Pyramid of Khufu is ranked number 1 among all the structures found in the Seven Wonders of the Ancient World, written and declared by Antipater, who was a statesman for Philip II of Macedon and Alexander the Great. This particular pyramid is the oldest of the seven wonders, having been … Read more
Erasers have been making our lives easier for a very long time now. As the saying goes, once done, cannot be undone. But, fortunately, with erasers, we can not only redo it once but, in fact, multiple times. For different types of marks and stains, erasers of different materials are used, with … Read more
Every year, Troy makes it a part of his bucket list to trek on a new trail. On a summer day, they decided to hike to the Ice Age Trail about 1,200 miles in the state of Wisconsin. As they walk, their sight was amazed by the woolly mammoths that grazed the … Read more
Precious metals are important for backing up our currency, making our jewelry, or as a sound investment for the future. One of the most universally-accepted valuable metals is gold, which is quite unique when you think about it. The attractive metal gold, in its actual form, is golden in color while silver, … Read more
Manufacturers give colorful stripes to toothpaste by using a two-in-one like tube within a tube. The main tube is filled with white paste. Another tube within the main tube is filled with colored paste. This type of design prevents white and colored pastes from mixing. A few holes are made on the upper … 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
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
Some decades ago there were no chemists’ shops. Instead of chemists druggists used to mix various compounds according to physicians’ prescriptions and sell them either in powder form or liquid form. Sometimes physician’s assistant used to prepare such mixture in the dispensary itself so he was known as compounder. These types of medicines … Read more