How Caffeine Works
The article explains how caffeine works as a stimulant in the body. It describes how caffeine inhibits the effects of adenosine, stimulates the production of adrenaline, and affects dopamine levels. The article also discusses the metabolism of caffeine and the potential risks of consuming excessive amounts.
How the Rubber Glove Was Invented
In the winter of 1890, Dr. William Halsted, the chief surgeon at Johns Hopkins Hospital, developed thin rubber gloves to protect his scrub nurse, Caroline Hampton, from a severe reaction to disinfectants. This led to the birth of the rubber glove industry and revolutionized the medical field, as well as resulting in Dr. Halsted and Caroline getting married.
Fresh Water Scarcity An Introduction to the Problem
The article discusses the global fresh water crisis and highlights the impact it has on people, particularly women and girls who have to travel long distances to access clean water. It challenges the assumption that individual wastefulness is the main cause of water shortages and emphasizes the need to address agricultural and industrial patterns of water use. The article also raises questions about how societies value and distribute water and calls for fresh water to be seen as a public good rather than just an economic commodity.
Why is My Leg Asleep
The article explains the phenomenon of limbs “falling asleep” and the resulting prickly sensation. It discusses how sitting or leaning in one position for too long can restrict blood flow to the limb, causing numbness, and how the nerves in the limb become confused when blood flow is restored, resulting in the pins and needles feeling. The article also provides tips for preventing and dealing with this sensation.
Can Loud Music Damage Your Hearing
This article explains the impact of loud music on hearing. It discusses how sound is processed by the ears and the vulnerability of hair cells in the cochlea. It also emphasizes the importance of protecting one’s ears from loud sounds, such as wearing earplugs at concerts, to prevent temporary threshold shift and potential permanent hearing loss.
How Do Germs Spread
The article discusses the invisible threat of disease-causing germs and how they are transmitted. It explains that the harmfulness of germs is a result of evolution and their mode of transmission. The article suggests that by implementing disease-control methods, such as mosquito-proofing houses and establishing clean water systems, we can reduce the harmfulness of infectious diseases by directing the evolution of germs.
What is Obesity
The article discusses the function of bodily fat and its evolutionary role. It explains that in prehistoric times, natural selection favored genotypes that could store the most fat as a self-storage of food reserves. However, with the advent of technological advances and increased access to food, obesity has become a global epidemic with numerous negative health impacts. The article emphasizes the need for global measures to address and prevent obesity.
How Can You Get Rid of Hiccups
The article discusses different methods for getting rid of hiccups. It explains that hiccups are caused by an involuntary spasm of the diaphragm and suggests ways to reset the nervous system to stop the spasms, such as stimulating the vagus nerve or increasing carbon dioxide levels. The article also shares the results of a survey on preferred hiccup remedies and invites readers to submit their own questions for future articles.
How Do You Get Rid of Acne
Acne is a common skin disease that occurs when follicles and pores become clogged with dead skin cells and oils. It is caused by factors such as genetics, hormones, and stress. Treatments for acne aim to reduce sebum production, prevent bacterial growth, and lower inflammation, and can range from over-the-counter medications to prescription medications and procedures like dermabrasion or laser resurfacing.
Kidnapped: The Adventures of David Balfour by Robert Louis Stevenson
“Kidnapped” follows the journey of David Balfour, a young man who is kidnapped and shipwrecked, as he navigates through treacherous Scottish landscapes in search of his rightful inheritance.