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Why do we shrink as we age?

Why do we shrink as we age

Why do we shrink as we age? The phenomenon of shrinking as we age is due to several physiological changes that occur in the human body.

Over time, the discs between the vertebrae in the spine lose fluid and become less spongy, which can lead to a decrease in height. This process is known as intervertebral disc degeneration. Additionally, the spine might compress due to the natural effects of gravity over the years, especially if posture worsens.

Osteoporosis is a common condition, particularly in older women due to hormonal changes after menopause, but also in men, where bones become porous and less dense. This can lead to a reduction in height because the weakened vertebrae might compress or even fracture, causing the spine to curve or the individual to lose height.

Sarcopenia, or the loss of muscle mass with age, can affect posture. Weaker muscles, especially in the back and abdomen, might not support the spine as well, leading to a slight stooping or bending forward, which can make someone appear shorter.

The arches of the feet can flatten over time, which might reduce height slightly.

Cartilage in joints wears down with age, which can also contribute to a loss in height, albeit minimally.

Poor posture or conditions like kyphosis (an exaggerated forward rounding of the back) can develop or worsen with age, contributing to height loss.

While the factors above contribute to a measurable decrease in height, the change is usually gradual and might not be very significant for everyone.

Efforts to help mitigate height loss

Weight-bearing exercises, strength training, and flexibility exercises can help maintain bone density, muscle strength, and posture.

Adequate intake of calcium and vitamin D is crucial for bone health. Protein is also important for muscle maintenance.

Being conscious of and working on maintaining good posture can prevent some height loss.

Regular medical check-ups can help manage or prevent conditions like osteoporosis through early detection and treatment.

Remember, while some height loss is a natural part of aging, significant or rapid height loss could be indicative of underlying health issues and should be checked by your healthcare provider.

Hopefully the above will help to answer the age (no pun intended) old question,”Why do we shrink as we age?”
 




 

How a landslide in Greenland shook the Earth for 9 days

A landslide in Greenland

A landslide in Greenland on September 16, 2023 triggered a significant seismic event due to the unique conditions of the local geography.

A massive piece of a mountain, approximately 3,937 feet high, collapsed into Dickson Fjord in eastern Greenland. This event was caused by the thinning of a glacier at the mountain’s base, which could no longer support the weight above due to melting ice.

The collapse led to a colossal rockslide, which in turn caused a mega-tsunami. The initial wave was estimated to be about 600 feet high. This wave was exceptionally large due to the volume of rock and ice that fell into the water.

The tsunami wave didn’t just dissipate; instead, it became trapped in the narrow and bendy Dickson Fjord. This led to a phenomenon known as a seiche, where the water sloshed back and forth like water in a bathtub. This sloshing continued for nine days, with the water moving every 90 seconds.

The continuous movement of this massive body of water within the fjord generated seismic waves that were detected globally. These waves caused the Earth to vibrate or ring for nine days, which was picked up by seismometers around the world.

Initially, this seismic signal was mysterious because it didn’t match typical earthquake patterns. An international team of scientists, along with help from the Danish military, used satellite imagery, field measurements, and advanced computer simulations to trace the signal back to this landslide-induced tsunami in Greenland.

This incident was unique due to the duration and nature of the seismic activity it caused, highlighting how interconnected Earth’s systems are with regard to unexpected geological events.

It’s pretty amazing how a landslide in Greenland could shake up the whole planet.

Note:

Greenland is a North American island autonomous territory of the Kingdom of Denmark. It is the larger of two autonomous territories within the Kingdom, the other being the Faroe Islands; the citizens of both territories are full citizens of Denmark.
 




 

Why do we dream when we sleep?

Why do we dream when we sleep

Why do we dream when we sleep? Dreams are one of the most fascinating and mysterious aspects of human psychology and neuroscience.

Listed below are some of the leading theories about why we dream.

One of the prominent theories is that dreaming helps with memory consolidation. During sleep, especially REM (Rapid Eye Movement) sleep when most dreaming occurs, the brain processes and consolidates information from the day, transferring short-term memories into long-term storage. Dreams might be a byproduct of this process, where the brain sorts, integrates, or discards memories.

Dreams could serve as a form of overnight therapy. The emotional content of dreams might help in processing and dealing with emotions, reducing the intensity of emotions, or helping us work through unresolved issues. This is somewhat akin to a psychological healing mechanism.

Some researchers believe that dreams help in problem-solving. In dreams, the mind can make connections between unrelated ideas or memories without the logical constraints of waking life, potentially leading to creative insights or solutions to problems.

The Threat Simulation Theory suggests that dreaming serves an evolutionary function by simulating potential threatening events, thereby enhancing the neuro-cognitive mechanisms required for efficient threat perception and avoidance in real life. This could explain why many dreams have a survival theme.

Another perspective is that during sleep, especially in REM phases, the brain is ‘cleaning up’, getting rid of unnecessary neural connections, and strengthening others. Dreams might be the cognitive echoes of this neural activity.

The Activation-Synthesis Hypothesis is a theory posits that dreams are the result of the brain trying to make sense of random neural firings in the brainstem. The brain, in an attempt to synthesize and interpret these signals, creates stories or images, which we experience as dreams.

In children, dreams might reflect the development of cognitive capabilities. As the brain grows and matures, the complexity and thematic content of dreams can change, suggesting a link between dreaming and cognitive development.

Some theories suggest dreams could be a way to keep the brain alert during sleep, preparing it to wake up quickly if necessary. This would have had survival benefits in more dangerous sleeping environments.

Each of these theories has its evidence and critiques, and it’s likely that dreaming serves multiple functions rather than a single one. Also, individual dreams might serve different purposes at different times. Despite extensive research, the exact purpose or mechanism behind dreaming remains partly elusive, making it one of the intriguing puzzles in neuroscience and psychology.
 




 

What George Washington had to say about political parties

What George Washington had to say about political parties

What George Washington had to say about political parties: George Washington, the first President of the United States, had significant reservations about the formation of political parties, which he expressed most notably in his Farewell Address, published in 1796.

Here are some key points from his views on political parties:

Warning Against Factionalism:

Washington warned against the dangers of factions and political parties. He believed that they could lead to a divided nation where regional and partisan interests might overshadow the common good. He saw parties as potentially destructive to the unity of the government and the country.

The Spirit of Party:

He spoke of “the spirit of party” as something that “serves always to distract the public councils and enfeeble the public administration.” Washington was concerned that parties would lead to internal strife, encourage foreign influence, and even lead to despotism.

Negative Effects on Liberty:

Washington feared that the competition between parties could eventually threaten liberties by leading to the concentration of power in one faction or another. He believed that this could result in a situation where the government might be manipulated by the prevailing party, thus undermining democratic principles.

The Alternate Domination:

He cautioned against “the alternate domination of one faction over another, sharpened by the spirit of revenge, natural to party dissension,” which he believed could lead to a more formal and permanent despotism.

Encouragement of Sectionalism:

Washington was particularly worried about parties forming along geographical lines, which could exacerbate regional tensions, potentially leading to the dissolution of the Union.

Call for Unity:

Instead of parties, Washington advocated for a unified government where the focus would be on shared national interests rather than partisan goals. He hoped that the love for liberty and the country would be enough to bind the nation together without the need for political parties.

Below is a direct excerpt from George Washington’s Farewell Address that pretty much encapsulates his sentiment.

“Let me now… warn you in the most solemn manner against the baneful effects of the spirit of party generally… It serves always to distract the public councils and enfeeble the public administration. It agitates the community with ill-founded jealousies and false alarms, kindles the animosity of one part against another, foments occasionally riot and insurrection.” — George Washington

Washington’s perspective was shaped by his experience of the early political divisions between the Federalists, led by Alexander Hamilton, and the Democratic-Republicans, led by Thomas Jefferson, during his presidency.

Despite his warnings, political parties became a fundamental aspect of American political life, illustrating the challenges of governing a diverse and growing nation.

George Washington’s concerns about the potential for division and the importance of unity remain relevant in discussions about our often times failing American political culture.




 

Why do we need the electoral college?

Montana Election Observation Initiative

Why do we need the electoral college? The need for the Electoral College in the United States can be understood through several historical, political, and practical lenses.

The U.S. is a federal republic where power is divided between the federal government and the states. The Electoral College reflects this by giving states a role in choosing the President, ensuring that the President represents the entire country, not just densely populated areas. This system was designed to balance the influence of large and small states, preventing a scenario where only the most populous states determine the election outcome.

The Founding Fathers were wary of direct democracy, fearing that a majority could consistently overpower minority interests. The Electoral College introduces a layer of indirection, aiming to ensure that the President has broad support across different regions of the country, not just from the majority population centers.

At the time of the Constitution’s drafting, there was significant debate over how to elect the President. The Electoral College was a compromise between selection by Congress and selection by a popular vote. It was also influenced by the need to reconcile the interests of slave states and free states, with the Three-Fifths Compromise affecting the allocation of electoral votes.

While not explicitly intended, the winner-takes-all approach in most states (except Maine and Nebraska) has reinforced a two-party system, which some argue promotes stability by reducing the fragmentation of political power.

In the late 18th century, communication and travel were slow, making it impractical for the entire nation to directly vote for a President in a timely manner. Electors, chosen by various state methods, could deliberate and vote more efficiently.

The Founding Fathers believed that electors would be more informed than the general populace about the qualifications of presidential candidates, acting as a safeguard against uninformed or overly passionate voter decisions.

Candidates must campaign across the country, appealing to a variety of interests rather than focusing solely on urban centers or any single demographic. This ensures that presidential candidates address issues pertinent to rural, suburban, and urban areas alike.

The Electoral College can provide a clear winner in cases where the popular vote might be extremely close or split among multiple candidates, reducing the likelihood of election disputes or the need for runoffs.

On the other side of the argument, the Electoral College has been criticized for several reasons:

The Electoral College can lead to a candidate winning the presidency despite losing the popular vote, as seen in several elections, which some argue undermines democratic principles.

Due to the allocation of electors (based on congressional representation), votes in less populous states can carry more weight than those in more populous states.

Although rare, electors can vote against the popular vote of their state, though this has had minimal impact historically.

Critics argue that with modern technology, the practical reasons for its creation (like communication delays) no longer apply, and direct popular vote could be more representative.

The debate over the Electoral College reflects broader discussions on representation, federalism, and democracy in the U.S., with arguments for its preservation often centered on maintaining the balance of state power and preventing urban dominance in national elections.