A recent report documents the occurence of something rarer (and interesting) event than ordinary lightning. Two opposing electrical discharges signalled the start of the event: one coming upward from a television transmission tower near Kanazawa, Japan, and the other coming downward from a thundercloud. The visible lightning strike was preceded by a blast of gamma radiation, which was invisible to the human eye, just 31 microseconds before they converged.

It was a short burst of radiation, known as a terrestrial gamma-ray flash, or TGF, which was a million times more intense than the subsequent flash.

This moment in time, which was documented in a seminal research that was published in Science Advances, is the first time that a downward TGF that has been precisely linked to a lightning strike has been seen from the ground. Additionally, it could change our perception of what happens within the strongest storms on Earth.

TGFs have been known to scientists for many years. Similar to the far-off gamma-ray bursts that flare across the cosmos during supernovae or the birth of black holes, these flashes were first seen in the 1990s by satellites circling the Earth. However, our own atmosphere is the source of TGFs.

Tower 1 was hit by lightning on January 30, 2023, at 01:13 AM local time. An upward positive leader from the top of the tower met a descending negative stream of electric charge, known as the leader, from the clouds. The TGF exploded as soon as they got close to one another, at a height of perhaps 800 to 900 meters above the earth, right before they collided.

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It just required a 20 microsecond burst of gamma rays, which is less than a second. The researchers employed specialised sensors that can detect very high-energy light to verify their observations. What they discovered excluded standard X-rays. These rays were significantly more potent; they were strong enough to cause airborne nuclear reactions, which is typically only observed in very intense cosmic occurrences.

The detectors continued to detect signals for more than 80 milliseconds after the initial flash. Researchers believe that this “afterglow” is most likely the result of neutron emissions from photonuclear processes, in which the gamma rays are powerful enough to split airborne elements like oxygen and nitrogen, producing a cascade of nuclear particles.

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This finding confirms a long-held but difficult-to-prove theory: that these intense radiation bursts originate from the early phases of lightning. Leaders extend their hands from the earth and the cloud before a lightning bolt strikes. Leaders carrying opposing charges may produce a powerful electric field that can propel electrons, which are little particles, to speeds that are nearly equal to the speed of light as they approach one another.

In atmospheric physics, such notion has been around for a while. However, there hasn’t been any concrete confirmation. “This study’s multi-sensor observations are a first for the world,” stated study senior author Harufumi Tsuchiya. “This technique has brought us closer to understanding the mechanism of these fascinating radiation bursts, even though some mysteries still remain.”

Importantly, the TGF happened immediately before to the lightning that was observed, not after. This particular aspect lends credence to the theory that the gamma-ray burst is a prelude to lightning, caused by the electric field milliseconds prior to the impact, rather than a result of lightning.

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A new study published in Space suggests that the mysterious moons Phobos and Deimos of Mars could have originated from debris left over when a big asteroid passed dangerously near the Red Planet. According to this new theory, Phobos and Deimos were formed from the remains of a bigger asteroid that had traveled too near to Mars and passed its Roche limit, which is the point at which the asteroid was torn apart by the gravitational tidal forces coming from the planet.

It is difficult to explain the moons of Mars. Both appear to be captured asteroids because they are tiny, with Phobos measuring 16 miles (26 km) across at its widest point and Deimos about 10 miles (16 km). They are also lumpy. Saturn’s moon Phoebe and Neptune’s moon Triton are two excellent examples of objects caught in orbit that often have extended, tilted, and occasionally retrograde orbits around their new home planet. But the orbits of Phobos and Deimos are neatly spherical and line up with the equatorial plane of Mars, which suggests that they originated in orbit around the planet.

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Another theory is that Phobos and Deimos developed similarly to Earth’s moon, with debris from an impact on Mars’ surface sending it into orbit and later combining to create the two moons. However, models that simulate an impact on the surface struggle to explain Phobos and Deimos’ stark differences in elevation above the surface of Mars, which are around 6,000 km (3,700 miles) and 23,000 km (14,577 miles), respectively.

Since Phobos and Deimos have been left without a third choice, this new model created by Kegerreis and his colleagues may have provided it. In addition to explaining how Deimos may have developed so distant from Mars, this new model also explains why Phobos and Deimos are found in round, equatorial orbits around the planet. Kegerreis and Lissauer admit that their concept is still only a theory at this time. That will soon be tested, though.

Read the full article here.

A report published by the BBC said the use of one type of neonicotinoid on sugar beet was “based on robust scientific assessment,” according to a Defra representative.

The use would be subject to severe constraints. Craig Bennett, the Chief Executive of the Wildlife Trusts, called it “scandalous.” Bees and other pollinators’ neurological systems and navigational abilities have been proven to be harmed by this class of insecticides, according to studies. Pesticides can also end up in streams and rivers, causing harm to aquatic species and persisting in the environment for a long period.

Read: China’s ‘Artificial Sun’ Just Set a New Plasma Fusion World Record.

Because of the potential risk of yellow fever viruses, which are spread by aphids and can severely harm crops, the government is now authorizing one type, thiamethoxam, to be used on sugar beet in England in 2022. It is estimated that over 70% of the country’s sugar beet harvest will be damaged.

The decision “was not taken lightly,” according to a Defra official. “We carefully assess the dangers and only issue temporary emergency pesticide authorizations in exceptional cases where severe standards are met and there are no other options.”

Sugar beet is grown by 3,000 farmers, according to the National Farmers’ Union (NFU), and the wider industry supports roughly 9,500 employment in England, mostly in the East. Farmers will be prohibited from planting flowering plants for 32 months following the sugar beet season to reduce threats to pollinators. “Growers would be relieved,” said NFU Sugar Board chairman Michael Sly. “The government’s limited and controlled emergency authorization for growers to use neonicotinoid seed treatment was to provide them with the tools they needed to combat this disease in the case of significant pest pressure, which we must remember resulted in crop losses of up to 80% in 2020.”

“It must be asked how permitting even temporary use of these poisons while harming our diminishing bee populations is compatible with reversing wildlife loss. Farmers, on the other hand, must be supported in order to lessen our reliance on these dangerous pesticides.

A report published in ScienceAlert documents that the Chinese Academy of Sciences has beaten a world record for plasma fusion just seven months after announcing it.

The Institute of Plasma Physics announces that their ‘artificial Sun’ tokomak reactor has kept a swirling loop of plasma superheated to 120 million degrees Celsius (216 million degrees Fahrenheit) for 1,056 seconds.

This also exceeds the previous record of 390 seconds achieved by the Tore Supra tokamak in France in 2003 for plasma confinement.

The EAST (Experimental Advanced Superconducting Tokamak, or HT-7U) reactor’s success is a significant step forward in the development of fusion energy.

The reactor reaches great temperatures by boiling hydrogen isotopes (hydrogen and deuterium) into a plasma. The fusion of these elements releases great amounts of energy, which takes the form of heat. Scientists now face the challenge of maintaining temperatures above 100 million degrees Celsius and operating the setup in a stable way over long durations.

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EAST also broke the time record on December 30, 2021, narrowly missing out on its aim of 1,000 seconds in 2021.

Don’t get me wrong: fusion still has a long way to go. At the moment, a fusion generator expends significantly more energy than it produces; nonetheless, increasing the plasma confinement period is a critical step toward making self-sustaining plasma fusion a reality.