CRISPR Gene Editing Proliferates
Sarah DK Sarah DK

CRISPR Gene Editing Proliferates

CRISPR sequences were first observed in 1987 by Japanese scientist Yoshizumi Ishino and colleagues whilst studying E. coli, though their function remained unclear[1]. The term "CRISPR" was coined in 2002, and by 2005 researchers proposed these sequences constituted a bacterial immune system against viruses[2].

The transformative breakthrough came in 2012 when Emmanuelle Charpentier (Umeå University) and Jennifer Doudna (UC Berkeley) demonstrated that CRISPR-Cas9 could be reprogrammed to cut any DNA sequence at predetermined sites[3]. Working independently, Virginijus Šikšnys at Vilnius University reached similar conclusions[4]. This convergence of discovery—simplifying bacterial defence into programmable "genetic scissors"—earned Charpentier and Doudna the 2020 Nobel Prize in Chemistry, awarded less than eight years after their initial publication[5].

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The Effects of Gender-Affirming Hormone Therapy on Health
Sarah DK Sarah DK

The Effects of Gender-Affirming Hormone Therapy on Health

Gender-affirming hormone therapy (GAHT), also known as cross-sex hormone therapy, involves the administration of sex hormones—oestrogen with anti-androgens for transfeminine individuals, or testosterone for transmasculine individuals—to align secondary sexual characteristics with gender identity. This post examines the documented physiological effects and mental health outcomes based on available clinical evidence.

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Seven Key Principles for Building Better Models
Sarah DK Sarah DK

Seven Key Principles for Building Better Models

Most machine learning tutorials focus on technical procedures—training loops, validation strategies, hyperparameter tuning. These are essential, but they're not sufficient. Below are seven principles that underpin effective modelling but rarely appear in standard curricula. They draw from cognitive science, epistemology, and practical experience building models that must actually work

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Why Stories Heal: The Neuroscience of Storytelling Therapy
Sarah DK Sarah DK

Why Stories Heal: The Neuroscience of Storytelling Therapy

Evidence that our brains are hardwired for narrative

Oral transmission of knowledge through storytelling is a pillar institution in many cultures—African griots, Indigenous storytellers, religious parables, political oratory. This isn't accidental. Speech is a specifically human skill, and the narrative format appears uniquely suited to how our brains process, retain, and respond to information.

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Water and its Atypical Physical Properties: The Mpemba Effect
Sarah DK Sarah DK

Water and its Atypical Physical Properties: The Mpemba Effect

Water holds a key role in many spiritualities and cultures, maybe in all of them. It is also a substance that has been challenging Physics since the advent of modern science and analytic methods. Here I present the discovery by a young Tanzanian school boy, Erasto Mpemba, in 1963.

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Why Do We Need to Sleep and Dream?
Sarah DK Sarah DK

Why Do We Need to Sleep and Dream?

The function of sleep and dreams has been studied for millennia. The oldest texts on these topics come from Ancient Egypt. Today, despite growing experimental and clinical research, we remain far from a coherent, complete picture. We're beginning to understand why we need sleep—its importance is becoming clear. But dream remains largely a mystery.

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Can We Control the Brain Remotely and Influence Behaviour?
Sarah DK Sarah DK

Can We Control the Brain Remotely and Influence Behaviour?

In 2016, the Guardian published an article about the experimental remote control of mice brain using a protein called “Magneto” and another technique using heated nanoparticles. What is the aim of these research programmes in neuroscience? Can we really control the brain remotely and to which extent?

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The Piri Reis Map
Sarah DK Sarah DK

The Piri Reis Map

A map dating from 1513 showing Antarctica almost 300 years before it was discovered (officially in 1820), but not only. Antarctica is represented without its ice cap. Plus the South American and African continents are correctly aligned in terms of their longitudinal positions. The author said he compiled several existing maps, but his sources are still debated.

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