Shampoo Science: “Dirty” Hair and What Those Ingredients Actually Do

For the average person, washing their hair every day or every few days is a matter of hygienic preference rather than necessity. Unless their work or pastime brings them in contact with dirt or involves physical exertion, it is unlikely that their hair would go from being clean to truly dirty in the span of twenty-four hours.

So, what is the true science behind our “dirty” hair and the ingredients in our shampoo?

Infant Developmental Milestones: High-Yield USMLE Points

When does a baby say its first words, Mama and Dada? When does a baby learn to stand up and walk on its own? Is it normal for an infant to develop stranger anxiety at 9 months? In this quick and easy-to-understand lesson, we review the infant developmental milestones at 1 month, 6 months, 9 months, 12 months, 2 years, 3 years, and 4 years. This lesson includes high-yield USMLE quick take-home points, high yield summaries, and practice test questions/answers on infant developmental milestones.

Loanwords and the Evolution of English

For all its complexities, and thanks in part to them, English is a highly versatile language. Several other languages have government affiliated academies that dictate their proper usage, voting on things like the addition of new words. No such body exists for English, making its development less top-down and more of a dialogue between those at the top and the general masses. One area where this can easily be seen is with loanwords.

Circulatory System: Heart Structures and Functions

Circulatory System: Heart Structures and Functions; Blood flows through the heart in the following order: body –>inferior/superior vena cava –> right atrium –> tricuspid valve –> right ventricle –> pulmonary arteries –> lungs –> pulmonary veins –> left atrium –> mitral valve –> left ventricle –> aortic valve –> aorta –> body…

Debunking the Middle Ages

One way of looking at history is in terms of progress. Many historians and fans of the subject laud Rome for its advances in military organization, infrastructure, and civics. Similar adulation is often heaped upon the Renaissance for the strides made in philosophy, arts, and sciences during that period, which in turn set the stage for the Age of Enlightenment. But what of the time between shining antiquity and the rekindling that was the Renaissance? lternately called the Dark Ages, the Middle Ages, and the Medieval Ages, the time period from roughly the 5th century to the 15th century is usually framed in the West as its own era of history.

Is COVID-19 Going to Resurge in the Winter?

370,000 deaths. 6,000,000 confirmed. 188 countries affected. The novel COVID-19 is leaving astonishing traces of deaths and illnesses as it rapidly encroaches upon our everyday lives. Schools are closed. Unemployment is surging. People experience dreadful losses of their family and friends. Luckily, however, the exponential curve of COVID-19 […]

Rewilding and Not So Wildlife

The basics of rewilding (at least in North America) are the Three C’s: Cores, Corridors, and Carnivores. Rewilding was developed in the 1990’s as a new approach to ecological restoration. Proponents have characterized it as being active rather than reactive. What this means is that instead of viewing conservation as stemming a tide or becoming shepherds to ever-declining animal populations, rewilding is focused on restoring the equilibrium of ecological systems. This is accomplished through a variety of methods that are grouped together under the Three C’s.

What are Vitamins?: Definition, Functions, and Health Benefits

Vitamins and minerals both help our bodies work properly, and they aid with functions such as growth and development. So what is the difference between the two? Simply stated, vitamins are organic and minerals are inorganic. This means that vitamins come from living sources, like plants and animals, while minerals come from elsewhere, such as the earth. Vitamins tend to have more complex structures than minerals, and because of this, are more prone to degradation via heat or chemicals. Today, we will be focusing on vitamins.

An Introduction to Skeletal Muscles: Properties and Physiology

The muscular system allows us to move and do our daily tasks. It also provides heat, stability, and blood flow for our body. There are three main types of muscular tissue: cardiac muscle, which comprises the heart muscle, smooth muscle, which comprises the linings of organs, and skeletal muscle, which are the muscles that help our body move. This article will focus on the physiology of skeletal muscles.