Science

Understand how a generator works by exploring the core components that convert mechanical motion into electrical energy. Discover the mechanics behind magnetic fields and wire coils.

This breakdown explains the essential parts of an electrical generator, specifically focusing on the interaction between the stator and the rotor. If you have ever questioned how wind turbine blades generate power, this video clarifies the process using a clear, simplified model. We examine the coil set and the rotating magnet to show exactly how electricity is made through basic physics.

Whether you are a student or simply curious about power systems, learning how a generator works provides a solid foundation for understanding modern energy production. This explanation focuses on the fundamental components like the stator and rotor to ensure you grasp the core concept of electromagnetic induction without unnecessary complexity.

Lake Powell ‒ the massive Colorado River reservoir that produces power for millions of homes across the West ‒ is the emptiest it has ever been entering the hottest part of the summer. And the worst is still to come.

Although the lake's levels have briefly fallen lower in years past, those low-water levels came in the spring, before melting snow refilled it. This year, that refill never happened.

As a result, Lake Powell will next spring fall to "minimum power pool," according to a newly released federal projection. If the water levels fall below that, the Glen Canyon Dam would stop generating electricity.

"This outcome is not a reflection of recent drought response actions, but rather a clear reminder that the Colorado River remains vulnerable," the federal Bureau of Reclamation wrote of its June 15 prediction.

If the water level falls even further, it could create environmental catastrophe by stopping the Colorado River flowing through the Grand Canyon, a point known as "dead pool." That is generally considered by experts to be an unlikely scenario because federal managers would likely create new outlets in the dam before it happens.

The amount of water in the reservoir has slowly been dropping as long-term climate change creates a warmer and drier West. Today, the lake is 23.28% full. It was last completely full in 1983.

A heatwave gripping western Europe has led to a series of unprecedented temperature highs, with France experiencing its hottest day ever, the UK seeing record heat for June and Spain reaching its highest daily average since 1950.

Tens of millions of people are grappling with punishing temperatures, which hit almost 41C in Paris and have led to red heat alerts across swathes of the continent.

France's national temperature indicator - an average of day and night temperatures across dozens of locations - hit 30C on Wednesday, the hottest day since records began in 1947.

More than half the country remains under a red heat alert, with tens of thousands of homes in the west without power.

Climate change is driving up temperatures around the world - but particularly in Europe. It is the fastest warming continent, heating up twice as fast as the global average, according to the Copernicus climate service.

This is causing increased summer heatwaves, greater pressure on Europe's water supply, and more intense wildfires.

Météo-France recorded provisional maximum temperatures across France that "remained relatively stable compared to the previous day".

Highs ranged from 39C to 43C across much of western France, with with 43C recorded in the Poitou-Charentes-Val de Loire region, slightly lower than the 44.3C seen in Pissos on Tuesday.

The intense heat saw two of Paris's landmarks - the Louvre and the Eiffel Tower - close earlier than usual.

A spokesperson for the Louvre said the building was "not sufficiently adapted to climate change".

At least 40 people drowned in heatwave-related incidents in France since Thursday, including a six-year-old at a beach in Bègles, Gironde.

Company failures, design flaws and inadequate regulatory oversight were to blame for the deadly 2023 Titan submersible disaster that killed all five passengers on board, according to the final report on the incident released by the Transportation Safety Board of Canada.

“The investigation determined that the as-built properties of the Titan’s carbon fibre cylinder were never validated to ensure they met the theoretical values used in the design process and that the construction and testing of the Titan did not follow standard engineering practices,” the agency concluded in its 136-page report.

It wrote that OceanGate, the US-based company leading the doomed expedition to the Titanic wreckage, didn’t fully grasp the extent of the danger the craft posed to passengers, and was blinded by “groupthink” and “confirmation bias.”

Agency inspectors examined unused pieces of the same material the Titan was made from and found fundamental structural defects that left it subject to compromised structural integrity, according to the report.

Although OceanGate tested the craft at an equivalent depth to that of the Titanic wreckage — approximately 12,500 feet — the report found it failed to test the impact on the vessel after facing the punishing forces of multiple voyages.

“The as-built properties of the Titan’s carbon fibre cylinder were never validated to ensure they met the theoretical values used in the design process, and the construction and testing of the Titan did not follow standard engineering practices,” TSB wrote.

“As a result, OceanGate did not know for how long the Titan’s pressure hull would remain structurally intact when used repeatedly for dives to the depth of the Titanic.”

What does it mean to be alive? A new study on an astonishing sea creature suggests the answer may be more complicated than it seems.

Some amputated fragments of Psolus fabricii — a type of sea cucumber native to the North Atlantic Ocean — puzzled researchers when they noticed that the severed parts did not simply decay and die but instead appeared to grow.

To find out more, the researchers humanely excised additional fragments from the feet, main body and tentacles of the marine animals and ran a number of lab experiments in untreated seawater. Indeed, the fragments refused to die. The various parts unexpectedly healed themselves and even managed to absorb nutrients despite lacking a mouth.

“This is the first case of tissue immortality in natural conditions,” said Sara Jobson, lead author of a study describing the finding that published Wednesday in the journal Science Advances. “These sea cucumbers are known for their high-regenerative capacity, so when they lose a tentacle or a tube foot they’re able to regrow it very well, but nobody’s ever looked at what happens to the tissues that are torn off, because we just assumed that they would die.”

Drones are helping transform barren mountains into green landscapes in northwest China's Gansu Province.

At a suburban park, plant-protection drones transport seedlings across steep slopes with precision, making afforestation safer, faster and far more efficient than traditional manual methods. Technology is accelerating China's push for ecological restoration.

In a move that’s raising alarm, researchers have poured 65,000 litres of sodium hydroxide into the Gulf of Maine, claiming it’s a step toward combating climate change through geoengineering.

With unknown effects on marine life, many are worried this experiment reeks of tinkering that could backfire.

The trial, dubbed the LOC-NESS project, took place off the Massachusetts coast last August, with scientists from the Woods Hole Oceanographic Institution leading the charge.

They argue that boosting ocean alkalinity could suck more CO2 from the atmosphere, turning it into harmless baking soda.

Yet, as globalist agendas push these unproven fixes, freedom-loving skeptics see it as another layer of control over nature without public consent.

Over four days, the team added the alkaline chemical, tagged with red dye for tracking, to waters 50 miles off Boston. “These early results demonstrate that small-scale OAE deployments can be engineered, tracked, and monitored with high precision,” said principal investigator Adam Subhas of the Woods Hole Oceanographic Institute. “We need independent, transparent research to determine which solutions might work.”

The method, known as Ocean Alkalinity Enhancement (OAE), aims to mimic and accelerate the ocean’s natural CO2 absorption.

As the document details, the oceans already trap around 38,000 billion tonnes of CO2 as dissolved sodium bicarbonate. By resetting the pH with sodium hydroxide, the scientists boosted it from 7.95 to 8.3—matching pre-industrial levels—and measured 10 tonnes of carbon entering the water immediately.

RABAT — A newly announced fossil discovery is further cementing Morocco’s central place in the prehistory of humanity. On Jan. 7, Moroccan and international researchers revealed the unearthing of ancient remains of hominins — human ancestors and close evolutionary relatives — in a cavity at the Thomas I quarry in Casablanca, shedding rare light on a pivotal and poorly understood phase of human evolution some 800,000 years ago.

Published in the journal Nature, the findings place North Africa at the center of debates over the divergence between early African human lineages and those that later gave rise in Europe and Asia to Neanderthals and Denisovans, respectively.

Researchers said the fossils, including lower jaw bones of adults and children, display a striking mix of archaic and more modern traits, reinforcing Africa’s long-established role in shaping human evolution. Attributed to 773,000 years ago, the dating of the remains is one of the most precise origins yet for a site yielding hominin fossils.

The discovery builds on a growing body of archaeological and paleoanthropological research that has transformed Morocco from a once-marginal player into a focal point of human evolutionary studies. In August, "A Reappraisal of the Middle to Later Stone Age Prehistory of Morocco" — a report by Nick Barton, Abdeljalil Bouzouggar, Stacy Carolin, and Louise Humphrey published in the Journal of the Royal Anthropological Institute — redirected attention to Morocco’s prehistoric record, calling for a "reappraisal" of its role in human evolution.

Almost a hundred new animal species that survived a mass extinction event half a billion years ago have been discovered in a small quarry in China, scientists revealed Wednesday.

The treasure trove of fossils offers a rare glimpse into a cataclysmic event that brought a sudden end to the greatest explosion of life in our planet's history.

The site where the fossils were found in the southern Chinese province of Hunan was "extraordinary," Han Zeng of the Chinese Academy of Sciences told AFP.

"We have collected over 50,000 fossil specimens from a single quarry that is 12 meters high, 30 meters long and eight meters wide," added the lead author of a new study in the journal Nature.

In this small space, the Chinese team uncovered more than 150 different species — 91 of them new to science — between 2021 and 2024.

Han described "wonderful experiences when we realized that those animals were right there on the rock."

"Many fossils show soft parts including gills, guts, eyes and even nerves," he added.

Among the species discovered were ancient relatives of worms, sponges and jellyfish.

They also found many arthropods — a family that includes modern-day crabs and insects — including spiny, stalk-eyed creatures called radiodonts which were the apex predator of the time.

“Over the last decade, the science of media has evolved, and simply taking devices away or enforcing rigid rules can backfire for parents,” Dr. Tiffany Munzer, a pediatric behavioral specialist at the University of Michigan Hospital, told ABC News. “We now understand there are specific design features of digital media — some that promote positive benefits, and others that are highly engagement-based that can overtake healthier activity."

While the guidelines don’t dismiss concerns about heavy screen use, they warn that enforcing time limits alone fails to address the influence of powerful platform designs built to drive engagement.

“Screen time alone doesn’t tell the whole story anymore,” Dr. Hansa Bhargava, a pediatrician and AAP spokesperson on social media use, told ABC News. “Today’s digital world isn’t just TV — it’s an immersive ecosystem designed to keep kids engaged as long as possible.”

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For example, low-quality digital use, including mindless scrolling, autoplay videos, frequent notifications and algorithms that push extreme or harmful material, can be highly stimulating but may lead to poor sleep, attention difficulties, academic challenges, and emotional regulation problems.

High-quality content, on the other hand, can enrich a developing mind, the report said, pointing out that some educational, creative, and social platforms avoid manipulative design features and prioritize privacy.

The new guidelines offer parents advice for effectively managing a child’s digital use, including being more selective about which sites to visit.

Ideally, a child can use a site with a caregiver, which can offer a window into how they think and feel, Munzer said.

Bhargava agreed, saying, “Watching a movie together and then talking about what you’re seeing, I don’t really think of as screen time -- It’s together time”

But the report and recommendations also called for technology companies and policymakers to do their part.

“Families have always carried the burden of managing screen time, but so much of this is out of their hands,” Munzer pointed out. “There are powerful systemic factors shaping children’s digital experiences — and that’s exactly why the responsibility has to be shared.”

Much less winter snow is falling on the Himalayas, leaving the mountains bare and rocky in many parts of the region in a season when they should be snow-clad, meteorologists have said.

They say most winters in the last five years have seen a drop compared to average snowfall between 1980 and 2020.

Rising temperature also means what little snow falls melts very quickly and some lower-elevation areas are also seeing more rain and less snow, which is at least in part due to global warming, according to the Intergovernmental Panel on Climate Change and other scientific reports.

Studies have also shown there is now what is known as "snow drought" during winter in many parts of the Himalayan region.

Accelerated melting of glaciers in the wake of global warming has long been a major crisis facing India's Himalayan states and other countries in the region. This dwindling snowfall during winter is making matters worse, experts have told the BBC.

They say that the reduction in ice and snow will not only change how the Himalayas look, it will also impact the lives of hundreds of millions of people and many ecosystems in the region.

As temperatures rise in spring, snow accumulated during winter melts and the runoff feeds river systems. This snowmelt is a crucial source for the region's rivers and streams, supplying water for drinking, irrigation and hydropower.

Apart from impacting the water supply, less winter precipitation - rainfall in the lowlands and snowfall on the mountains - also means the region risks being gutted by forest fires due to dry conditions, experts said.

They add that vanishing glaciers and declining snowfall destabilise mountains as they lose the ice and snow that act as cement to keep them intact. Disasters like rockfalls, landslides, glacial lakes bursting out and devastating debris flows are already becoming more common.

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A study Hunt co-authored and published in 2025 has included four different datasets between 1980 and 2021, and they all show a decrease in precipitation in the western and part of the central Himalayas.

Using datasets from ERA-5 (European Centre for Medium-Range Weather Forecasts Reanalysis), Hemant Singh, a research fellow with the Indian Institute of Technology in Jammu, says snowfall in the north western Himalayas has decreased by 25% in the past five years compared to 40-year long-term average (1980-2020).

Poor oral health may significantly reduce life expectancy, according to a new Japanese study that calls for better dental maintenance among older adults.

Frail oral health, defined as having fewer remaining teeth, dry mouth, trouble speaking, and difficulty chewing and swallowing, can reflect poor general health in ageing people.

Someone may have most of their natural teeth but still be considered “orally frail” if they suffer chewing problems as mouth health also involves muscle strength, saliva, and swallowing ability.

Such oral frailty, Japanese researchers found, was strongly tied to lower chances of healthy ageing.

“Dental visits may mitigate this outcome in older adults,” they noted in the latest study, published in the journal Geriatrics & Gerontology International.

The researchers assessed the oral health of 11,080 adults in Japan aged 65 or above.

The study participants were asked whether they had visited a dentist in the previous six months and were followed for an average of six years, using the national disability and mortality records, to see if they stayed healthy, developed disabilities, or passed away.

Having had a recent dental visit was treated as a sign that the participant maintained their oral health.

The researchers also estimated each participant’s healthy life expectancy, a measure of how many years one could live without disability or serious health decline.

Of the 11,080 adults assessed, 12 per cent had oral frailty at the start of the study and about 50 per cent had visited a dentist in the past six months. Those with oral frailty were 23 per cent more likely to move from healthy to disability during the follow-up period compared to those without. And the orally frail participants were 34 per cent more likely to die during follow-up.

NANCHANG, Dec. 14 (Xinhua) -- China's largest freshwater lake, Poyang Lake, has shrunk by 90 percent from its high-water season level and entered an extremely low-water level, local authorities said Sunday.

At the landmark Xingzi hydrological station in east China's Jiangxi Province, the water level fell below the extremely low-water mark on Sunday morning, with the gauge reading only 8 meters.

This year, Poyang Lake's water level first dipped below the 12-meter drought warning line on Aug. 8, 87 days earlier than the average time of previous years. To date, the lake has been 217 days below the drought warning line, meaning nearly two-thirds of the year in low-water conditions.

To address the situation, a nearby water supply company in Duchang County has mobilized 10 pumps operating at full capacity to draw water from the outer lake to the plant's intake, said Wang Chunhua, head of the company's production and operations department.

The company also stepped up inspections of drinking water sources and increased the frequency of water quality testing to ensure the safety of drinking water for 160,000 urban and rural residents nearby.

The lake has repeatedly set new low-water records in recent years, with a growing trend of dry seasons starting earlier, lasting longer, and reaching lower water levels.

In 2022, its water level dropped to a record low of 4.6 meters. The following year, the lake entered its dry season on July 20, the earliest date on record.

Experts warn that the prolonged low water levels will affect the wintering of hundreds of thousands of migratory birds, including Siberian cranes, oriental storks and white-naped cranes, as well as the reproduction of aquatic species such as the finless porpoise.

Scientists working in Mexico have recorded multiple incidents in which a group of orcas hunt young great white sharks and eat their energy-rich livers.

While orca pods in South Africa, Australia and California have been recorded engaging in similar behavior, this is the first time that it has been documented in Mexico, according to a study published in the journal Frontiers in Marine Science on Monday.

In one incident, recorded in August 2020 using various cameras as well as a drone that captured aerial footage, a group of five female killer whales were recorded working together to attack a young white shark and remove its liver, before sharing it between them.

A few minutes later, the group attacks another young white shark, successfully removing the liver.

Another recording dates to August 2022, when a mixed group of orcas were recorded attacking a young white shark in the same location, then eating the liver.

The study noted that in two of the three recorded predation events the orcas immobilized the shark by flipping it onto its back and deftly avoided bites that could thwart the attack.

An Australian freshwater Murray cod has surprised scientists by swimming a marathon 530 miles along a major river system, believed to be a record for the species.

The fish, named Arnie after Australia's recently retired Olympic champion Ariarne Titmus, was first tagged in early 2022 in Mullaroo Creek, about a 13-hour drive west of Sydney, said Arthur Rylah Institute researcher Zeb Tonkin.

Four years old and weighing in at 3.7 pounds at the time, it "took off" when floods hit the area in the spring of that year, Tonkin said, traveling an initial 470 miles upstream in fewer than two months.

The scaly river dweller, an apex water predator, was able to cover longer distances because barriers had been removed along the Murray River to let flood waters pass through.

"It basically provided free passage for fish," said Tonkin.

Arnie then turned around at some point in the past 12 months, swimming another 60 miles downstream toward home.

Researchers only discovered the extent of the fish's travels when sharing data with colleagues a couple of weeks ago.

"We've been working on these species for decades ... and we haven't come across that sort of scale of movement beforehand," Tonkin said. "Probably the best we have seen a Murray cod do is around 160 kilometers (100 miles)."