Medicine

CRISPR-Cas9 is a molecular tool derived from a bacterial immune system that allows scientists to cut, edit, or silence specific genes with extraordinary precision. First harnessed for genome editing in 2012, it has since revolutionised biology and medicine. By 2023, the first CRISPR-based therapy (for sickle cell disease) was approved by the FDA. The tool works like molecular scissors guided by a RNA 'map' to the exact gene sequence needing editing.

Prior to the development of black mamba antivenom, a bite was considered a death sentence across sub-Saharan Africa. Local communities called it 'the kiss of death.' Even today, antivenom must be administered quickly — ideally within 20 minutes — and in sufficient quantities. Rural communities far from hospitals still face a grim prognosis if bitten, and black mamba bites claim hundreds of lives annually across Africa.

Without antivenom treatment, a black mamba bite has a near-100% fatality rate. Its venom is a powerful cocktail of neurotoxins and cardiotoxins that causes paralysis, respiratory failure, and cardiac arrest. Symptoms begin within 10 minutes; death can occur in 7 to 15 hours without treatment. It delivers up to 400mg of venom per bite — far more than needed to kill a human.

Just months after Wilhelm Röntgen announced his discovery of X-rays in December 1895, doctors began using X-rays medically in 1896. The first clinical use in the US was in February 1896 at Dartmouth, when physicians used X-rays to locate a bullet in a patient's leg. Within the year, X-ray machines were being used in hospitals around the world — a revolution in diagnostic medicine.

Despite its toxicity, compounds found in scorpion venom are being researched for their therapeutic properties, including potential uses in pain relief, anti-cancer treatments, and as immunosuppressants. Scientists are isolating specific peptides that selectively target disease cells without harming healthy ones.

The placebo effect demonstrates the brain's incredible power to heal itself. Patients given an inert substance, believing it's a real drug, can experience genuine physiological changes and symptom relief, even for conditions like pain, depression, and Parkinson's disease, highlighting the mind-body connection.

Phantom limb pain is a phenomenon where individuals who have had a limb amputated still experience sensations, including pain, itching, or pressure, as if the limb were still there. It's believed to be caused by changes in the brain and nervous system, showing the brain's complex mapping of the body.

Capgras Syndrome is a delusional misidentification syndrome where a person believes that a close friend, spouse, parent, or other family member has been replaced by an identical-looking imposter. It's often associated with brain injury or neurodegenerative diseases, making recognition difficult.

In the late 19th and early 20th centuries, "asthma cigarettes" containing ingredients like belladonna and stramonium were marketed as a treatment for respiratory ailments. The idea was that the smoke would open airways, a tragically misguided approach that highlights past medical misunderstandings.

Exploding Head Syndrome is a parasomnia where individuals hear a sudden, loud noise like a bomb exploding, a cymbal crash, or a gunshot inside their head just before falling asleep or waking up. Despite the terrifying sound, it's painless and harmless, though often startling.