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Squids belong to a group of mollusks called cephalopods of the order Teuthida, which includes about 800 species. Cephalopods appeared on Earth several million years before primitive fish, and despite their short life spans, they have a thriving population. Squids…
The Earth’s atmosphere is unique within the solar system and plays an essential role in maintaining a hospitable environment for life. There are a number of distinct layers of the atmosphere, and these each play a role in regulating the…
Each element in the periodic table has a unique number of positively-charged protons in its nucleus, but the number of neutrons, which have no charge, can vary. Atoms of an element with different numbers of neutrons are isotopes of that…
Many people may find it daunting to convert from meters per second to miles per hour since you are not only converting the distance, but you are also converting the time in which the distance is traveled. The long way…
Despite their reputation for being dry empty wastelands, deserts are home to one-sixth of the world’s population, and they cover over one-fifth of the Earth’s landmass. Deserts can be found on every single continent, and even though they lack water,…
Many college programs require statistics. A key concept presented in a typical statistics class is the normal distribution of data or a bell curve. Understanding how to interpret a set of data that falls in a natural distribution makes understanding…
Peacocks are some of the most widely recognized birds in the world, due to their beautiful blue-green plumage and spotted tail feathers, which fold open into an elaborate fan. These birds are about more than their feathers, though, and not…
Crime shows on television have one thing right: Certain substances radiate beneath the purple-blue glow of a black light. A big hit in the 1960s, many kids outfitted their rooms with black lights and the special fluoresced posters that glimmered…
Cubic measures and square measures represent fundamentally different things. A cubic measure is always a three-dimensional unit of volume: length times width times height. A square measure is always a two-dimensional unit of area: length times width. However, there are…
Ice is the solid form that liquid water takes when it is cooled below 0 degrees Celsius (32 degrees Fahrenheit). Ice melts due to the chemical properties of water. There are more hydrogen bonds between the molecules of ice than…
