History and Discovery of Electromagnetic Pulse (EMP)

The history of electromagnetic pulses (EMPs) is a story of scientific discovery intertwined with military innovation and the challenges of modern technology. An EMP is a short burst of electromagnetic energy caused by a rapid acceleration of charged particles, capable of disrupting or damaging electronic systems and infrastructure. The understanding of EMPs evolved significantly over the 20th century, particularly in the context of nuclear weapons research and testing.

The concept of EMPs was first noted in the early 20th century as scientists explored electromagnetic phenomena. However, the transformative moment came during the Manhattan Project in World War II, which developed the first atomic bombs. In 1945, when the bombs were detonated over Hiroshima and Nagasaki, scientists observed anomalous electrical disturbances, though the underlying mechanisms were not fully understood. These observations laid the groundwork for further research.

The pivotal discoveries about EMPs occurred during high-altitude nuclear tests conducted in the early 1960s. The United States' 1962 Starfish Prime test, which detonated a nuclear warhead 400 kilometers above the Pacific Ocean, provided critical insights. The test produced a massive EMP that disrupted electronics and power grids over 1,400 kilometers away in Hawaii, damaging streetlights, telecommunications, and other infrastructure. Similar tests conducted by the Soviet Union corroborated these findings, confirming that high-altitude nuclear detonations could generate EMP effects capable of impacting vast geographic areas.

The scientific understanding gained from these tests highlighted the potential vulnerability of modern electronic systems. By the mid-20th century, EMP research expanded beyond nuclear detonations. Scientists and engineers began to explore non-nuclear EMP sources, including solar geomagnetic storms and specialized electromagnetic weapons. The Carrington Event of 1859, a massive solar storm that caused widespread telegraph disruptions, was retrospectively understood as a natural EMP event, further illustrating the scope of the phenomenon.

These discoveries prompted governments to take action. Military organizations and infrastructure planners began developing shielding technologies, such as Faraday cages, to protect critical systems from EMP damage. The U.S. and allied nations also incorporated EMP survivability into the design of strategic assets, including missile defense systems and command centers. In recent years, concerns about EMP threats have expanded to include the risks posed by non-state actors and natural solar events, driving ongoing innovation in EMP protection.

In conclusion, the history of EMPs reflects a fusion of scientific discovery and strategic necessity, underscoring their significant impact on modern technology and national security.
History and Discovery of Electromagnetic Pulse (EMP)

James Webb Space Telescope: A New Era in Infrared Astronomy

The James Webb Space Telescope (JWST) represents a monumental leap in space exploration and astronomy. Its journey began in the early 1990s when astronomers and engineers, even before the launch of the Hubble Space Telescope, foresaw the need for a more advanced instrument that could observe the universe in infrared light. This capability would allow scientists to peer through cosmic dust and gas, providing insights into regions and objects that had been hidden from visible-light telescopes. Such an instrument would be critical for studying star formation, distant galaxies, and the origins of the universe.

In 1996, NASA initiated the Next Generation Space Telescope (NGST) project, which was later renamed the JWST. The objective was ambitious: to build a telescope with a much larger mirror than Hubble’s, capable of detecting the faintest infrared signals from the earliest galaxies that formed after the Big Bang. The plan involved the development of a segmented mirror design, consisting of 18 hexagonal segments that would unfold in space, creating a mirror over 6.5 meters in diameter—much larger than any previous space telescope. Along with this advanced mirror system, the telescope was equipped with sensitive scientific instruments designed to analyze the infrared light it captured, providing unparalleled detail of the universe's farthest reaches.

By 2002, the NGST was officially renamed in honor of James E. Webb, NASA’s second administrator, who led the space agency during the critical years of the Apollo program. His leadership was instrumental in achieving NASA's goal of landing humans on the Moon, and the JWST name reflects his legacy in advancing space exploration.

After construction began in 2004, progress was steady but faced delays due to the complexity of the project. Major milestones were achieved in 2011 with the completion of the 18-segment mirror, and by 2015, the scientific instruments were delivered for integration. The telescope underwent extensive testing to ensure it could survive the rigors of space travel, including extreme temperature fluctuations and the vacuum of space.

On December 25, 2021, the JWST was launched aboard an Ariane 5 rocket from French Guiana, marking a critical moment for the space science community. The telescope successfully arrived at the Sun-Earth L2 Lagrange point in January 2022, a stable location in space where it could maintain a consistent view of the cosmos. Its first breathtaking images, revealing intricate details of nebulae, galaxies, and distant stars, were released to the public on July 12, 2022, ushering in a new era of discovery and reinforcing the telescope’s importance in furthering our understanding of the universe.
James Webb Space Telescope: A New Era in Infrared Astronomy

History and discovery of artificial sweetener saccharin

Saccharin is the first and oldest artificial sweetener that has been used for over a century to sweeten foods and beverages without adding calories. Saccharin is approximately 200-700 times sweeter than sucrose.

Saccharin has been identified by Fahlberg and Remsen in the year 1878 at university of John Hopkins (Baltimore). This was found after those chemists were researching the oxidation mechanisms of toluene sulfonamide.

They were working with coal-tar derivatives. During their research, a substance accidentally splashed on Fahlberg’s finger and he noticed the substance had a sweet taste, which he traced to the chemical commonly known as saccharin.

Remsen and Fahlberg’s original paper on the discovery of saccharin was published in 1879, one year after their experiments had been performed.

Saccharin was widely spread during global wars when the sugar shortage provoked, e.g., during world wars I and II.

Saccharin was banned in the year 1981, because this caused bladder cancer in rats after giving overdose of saccharin.

In 2000, the National Toxicology Programme determined that saccharin should no longer be listed as a potential cancer-causing agent because mechanistic studies have shown that these results apply only to rats. Saccharin remains an FDA approved sweetener.
History and discovery of artificial sweetener saccharin

Recording nerve impulses by Joseph Erlanger

In 1848, Emil du Bois-Reymond used a galvanometer to measure currents in muscles. In 1926, Edgar Adrian took advantage of the amplification of a tube amplifier to measure single nerve impulses.

Erlanger is a US physiologist who, in collaboration with Herbert Spencer Gasser, developed techniques for recording nerve impulses using a cathode ray oscilloscope in 1922 in St. Louis.

While working at Johns Hopkins University, he created a sphygmomanometer, and instrument for measuring blood pressure.  It was the arrival if Gasser, one of his former students, that ignited his interest in the study of the conduction of nervous impulses.

They performed their research in a humidified frog nerve kept at a constant temperature. For this work and its continuation by Erlanger and Gasser separately in later years, they were in 1944 jointly awarded a Nobel Prize.

It can be regarded as the first major discovery in neurophysiology coming from the New World.

Further progress came with the introduction of intracellular in the middle decades of the 20th century by Gilbert Ling, Ralph Girard, Kenneth Cole, Alan Hodgkin and Andrew Huxley.
Recording nerve impulses by Joseph Erlanger

History of computer: Mark 1

English mathematician Charles Babbage (1792-1871) is recognized as the first to conceptualize the computer. He worked to develop a mechanical computing machine called the ‘analytical engine’, which could perform all sorts of calculations and is considered the prototype of the digital computer.

In the US, a team of Harvard and IBM scientists led by Howard Hathaway Aiken were also working on a programmable computer. This computer, called Mark I, was completed in February 1944. It is the fully automatic calculator, very big and fancy.

Over five tons and fifty-one feet, the Mark I was huge in size and weight. The Mark I had a memory capacity of 72 numbers and it could be programmed to perform a 23-digit multiplication in the lightning-like time of 4 seconds. 

The first functional computer program was written by Grace Murray Hopper (1906-1992) an admiral of the US Navy. Hopper, a professor of mathematics at Vassar College had been ordered by the Navy to assist Howard Aiken with programming of Mark I.

The importance of Mark I is primary its role in making known to the world at large that a machine could successfully perform a programmed sequenced of operations and do so automatically without error.
History of computer: Mark 1