Spiders produce silk threads to build their webs. The silk is produced in silk glands with the help of the spider’s spinnerets. Spinnerets are special organs that allow the spider to decide what type of thread it needs for the web. The silk threads can be thick or thin, dry or sticky, beaded or smooth. The threads a spider uses… Read more →
The aim of the search engine algorithm is to present a relevant set of high-quality search results that will fulfil the user’s query/question as quickly as possible. The user then selects an option from the list of search results and this action, along with subsequent activity, then feeds into future learnings which can affect search engine rankings going forward. Search… Read more →
There’s a sweet spot above the Earth where a satellite can match the same rotation of the Earth. This special position in high Earth orbit is known as a geosynchronous orbit. About 35,786 kilometers above the Earth’s surface, satellites are in geostationary orbit. From the center of the Earth, this is approximately 42,164 kilometers. This distance puts it in the high Earth… Read more →
Closed ecological systems (CES) are ecosystems that do not rely on matter exchange with any part outside the system. The term is most often used to describe small manmade ecosystems. Such systems are scientifically interesting and can potentially serve as a life support system during space flights, in space stations or space habitats. In a closed ecological system, any waste… Read more →
Hard disk drives require a certain range of air pressures in order to operate properly. The connection to the external environment and pressure occurs through a small hole in the enclosure (about 0.5 mm in breadth), usually with a filter on the inside (the breather filter). If the air pressure is too low, then there is not enough lift for… Read more →
[su_dropcap style=”default” size=”3″ class=””]A[/su_dropcap]irship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from a lifting gas that is less dense than the surrounding air. In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability. Helium… Read more →
There are three main categories of contact lenses, based on the materials they are made of: soft contacts, rigid gas permeable (GP) contacts, and hybrid contact lenses. Soft contacts are made of pliable hydrophilic (“water-loving”) plastics called hydrogels. Hydrogels absorb significant amounts of water to keep the lenses soft and supple. Because of this water-loving characteristic, the water content of… Read more →
How many islands are there in Japan? Japan is a stratovolcanic archipelago of 6,852 islands. The four largest islands are Honshu, Hokkaido, Kyushu, and Shikoku, which together comprise about ninety-seven percent of Japan’s land area. Why does Japan get so many earthquakes? Japan is located along the Pacific “ring of fire”, on the edges of… Read more →
Scorpion Venom is the most expensive liquid on earth at approx $39,000,000 per gallon/3.79 liters. Scorpions use their venom as a defence against predators to paralyse and kill their prey. The venom is comprised of groups of complex molecules called neurotoxins. These are proteins consisting of 60-70 cross-linked amino acids that when injected attack the nerve cells of the victim… Read more →
1. Which national anthem don’t have official lyrics? The Marcha Real (Spanish pronunciation: [ˈmartʃa reˈal], “Royal March”) is the national anthem of Spain. It is one of only four national anthems (along with those of Bosnia and Herzegovina, Kosovo, and San Marino) in the world to have no official lyrics. 2. Which city located in two continents? Istanbul is the city in the world located on two… Read more →
