Summary
Highlights
Anesthesia, discovered by English scientist Humphrey Davy in 1801, revolutionized surgery by making operations painless. Davy found that nitrous oxide induced euphoria, laughter, and eventually numbness to pain, leading to its adoption by dentists and doctors.
Electricity, a fundamental property of the universe, began to be understood in the 17th century with the invention of electrostatic generators and the distinction between positive and negative currents. Benjamin Franklin's experiments and the subsequent invention of the light bulb transformed the world by bringing light and power.
Louis Pasteur's germ theory in 1856 explained how diseases spread and food spoils. He proved that microscopic organisms (germs) exist everywhere and cause decay, and introduced sterilization techniques and pasteurization to combat bacterial growth in food and prevent disease.
The Rosetta Stone, discovered in 1799, allowed historians to decipher ancient Egyptian hieroglyphics after 1500 years. This black granite slab contained identical text in hieroglyphics and Greek, enabling the translation of countless ancient Egyptian writings.
The use of fingerprints for identification was developed by William Hershel in India for contracts and later by Juan Busatich in Argentina for identifying criminals. This discovery revolutionized the justice system by providing a reliable method to link individuals to crimes.
Copernicus's heliocentric theory, proposed in the 16th century, proved that the Earth revolves around the Sun, not the other way around. This challenged centuries of geocentric belief and was a monumental discovery, despite initial resistance from institutions like the Catholic Church.
The discovery of the Tuang Child in 1924, a fossilized primate identified as a transitional species between ancient apes and modern humans, provided key evidence for Darwin's theory of evolution. This 2.8-million-year-old fossil supported the idea that humans originated from Africa.
Edward Jenner's discovery of vaccination in 1774, observing that cowpox immunity protected against smallpox, paved the way for modern vaccines. His pioneering work, though audacious, proved his theory and has since saved millions of lives from various diseases.
In 1953, Francis Crick and James Watson created the first accurate model of DNA's molecular structure. This breakthrough revealed the master code for living organisms, allowing scientists to develop cures for deadly diseases and eventually map the entire human genome.
Penicillin, discovered by Alexander Fleming in 1928, is an antibiotic that has saved an immeasurable number of lives. Fleming noticed a mold (Penicillium notatum) inhibiting bacterial growth in a culture dish, leading to the development of this crucial medicine for treating infections.