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Seoul Residents Sweating with Record ‘Tropical Nights’ Weather 

Women use umbrellas to shield from the sun at a market in Seoul on August 16, 2024, during a prolonged heatwave which has gripped much of the country. (AFP)
Women use umbrellas to shield from the sun at a market in Seoul on August 16, 2024, during a prolonged heatwave which has gripped much of the country. (AFP)
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Seoul Residents Sweating with Record ‘Tropical Nights’ Weather 

Women use umbrellas to shield from the sun at a market in Seoul on August 16, 2024, during a prolonged heatwave which has gripped much of the country. (AFP)
Women use umbrellas to shield from the sun at a market in Seoul on August 16, 2024, during a prolonged heatwave which has gripped much of the country. (AFP)

Residents of South Korea's capital are resorting to novel ways to beat the heat as a century-old weather record fell Friday following a 26th "tropical night" in a row -- when the temperature stays above 25 degrees Celsius (77 Fahrenheit).

"I take a cold shower before bed and tie freezer packs around my electric fan to cool the air," Lee Ji-soo told AFP Friday.

Overnight temperatures in Seoul have sizzled above 25 degrees Celsius for 26 days in a row, officials said Friday, marking the longest streak since modern weather observation began in 1907.

Such evenings are widely known as "tropical nights" in South Korea.

Much of the world is enduring a summer of sweltering weather, with UN Secretary-General Antonio Guterres warning last month of an "extreme heat epidemic", and calling for action to limit the impact of climate change.

The intense heat in Seoul is expected to continue, according to the met office, setting a record every day until next week.

"The cold air is not coming down from the north," Youn Ki-han, director at Seoul's Meteorology Forecast Division, told AFP.

"Usually around this time the temperature drops in the morning and evening... but currently we aren't seeing any signs of that yet," said Youn.

As temperatures soar, residents struggle to find ways to cope with the sweltering nights.

"I think I turn on my air conditioner 23 hours a day," said Kim Young-sook, who lives in Gangnam district, an affluent neighborhood in Seoul.

"I'm worried my dogs will become too hot -- even during at night."

That isn't an option for Lee Ji-soo, who straps icepacks to her fan.

"I do have an air conditioner but I just can't afford the electricity bill," she said.

"The air is suffocating sometimes. I don't know how long I can live like this."

- Power hungry -

Data from Korea Power Exchange showed South Korea's electricity demand hit an all-time high on Monday as people battled the heatwave with air conditioners and fans.

Some 102.3 gigawatts were used, passing the previous record of 100.6 gigawatts set last August, the agency said.

According to the International Institute for Environment and Development (IIED), the number of days with temperatures reaching 35 degrees Celsius in the world's largest capital cities has surged by 52 percent over the past 30 years.

In 2018 alone, Seoul experienced 21 days with temperatures over 35 degrees Celsius -- more than the previous 10 years combined.

"In just one generation, there's been an alarming increase," said Dr Tucker Landesman, a senior researcher at IIED.

Climate activists in South Korea are calling for more government action.

"There's no chance that this will get better and it's bound to get worse," Youn Se-jong, an environmental lawyer, told AFP.

"Strengthening the goal of reducing greenhouse gas emissions should be the priority," he added.

South Korea currently has the lowest proportion of renewable energy in its power mix among all OECD countries and is the G20's second-highest carbon emitter from coal per capita, according to energy think tank Ember.

North Korea is also sweltering under a heatwave and issued a warning earlier this week, with central areas including Pyongyang affected.

"Severe heat of 33 to 37 (degrees Celsius) is foreseen in some areas," said Kim Kwang Hyok, an official at the State Hydro-Meteorological Administration.

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Best Time to Take Vitamin D for Muscle Strength

Vitamin D tablets (file photo – AP)
Vitamin D tablets (file photo – AP)
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Best Time to Take Vitamin D for Muscle Strength

Vitamin D tablets (file photo – AP)
Vitamin D tablets (file photo – AP)

Vitamin D is an essential nutrient that plays a central role in both bone and muscle health.

With growing interest in dietary supplements, a key question arises: what is the best time to take vitamin D to support muscle strength?

This article reviews the latest scientific evidence on vitamin D timing and its impact on muscle health, offering practical recommendations based on recent research.

The optimal time to take vitamin D is with or after a meal that contains fat- preferably in the morning or at lunchtime. Taking it with food enhances absorption, supporting bone health and contributing more effectively to muscle strength. It is also advisable to take it at the same time each day for best results.

How Vitamin D Works in Muscles

Vitamin D is a fat-soluble vitamin, meaning its absorption in the intestine depends heavily on dietary fat. When taken with a fat-containing meal, micelles form, facilitating its transport across the intestinal wall into the bloodstream. It then reaches muscle cells, where it helps promote muscle protein synthesis and improve muscle fiber function.

Scientific Evidence on Timing

A randomized controlled trial published in Nutrients (2022) found that taking a combination of whey protein and vitamin D3 either before sleep or after waking led to beneficial increases in muscle mass in young men undergoing resistance training.

Importantly, no statistically significant differences were found between the groups in terms of muscle gains, suggesting that vitamin D’s benefits for muscle health are not dependent on a specific time of day, but rather on consistent intake.

Effects on Sleep and Melatonin

Some research indicates a link between vitamin D levels and sleep quality, with low levels associated with a higher risk of sleep disorders.

Certain recommendations suggest that taking vitamin D in the evening may interfere with melatonin production—the hormone that regulates the sleep-wake cycle. For this reason, experts generally recommend taking vitamin D in the morning or at midday to avoid potential sleep disruption.

Vitamin D and Athletic Performance

A systematic review published in the Journal of Human Sport and Exercise (2025), analyzing 13 studies on vitamin D and athletic performance, found:

  • Vitamin D supplementation consistently increases blood levels in athletes
  • Noticeable improvements in performance among those initially deficient
  • Mixed effects on muscle recovery and blood markers across studies
  • Seasonal fluctuations in vitamin D levels highlight the importance of supplementation timing

Taking vitamin D with main meals and maintaining daily consistency are key to maximizing its benefits for muscle health. Consulting a healthcare provider is recommended to determine the appropriate dosage based on individual health status and blood levels.

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Taif Rose Harvest Season Produces over 550 Million Roses

Rose farms are spread across the highlands of Al-Hada and Al-Shafa - SPA
Rose farms are spread across the highlands of Al-Hada and Al-Shafa - SPA
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Taif Rose Harvest Season Produces over 550 Million Roses

Rose farms are spread across the highlands of Al-Hada and Al-Shafa - SPA
Rose farms are spread across the highlands of Al-Hada and Al-Shafa - SPA

Taif rose farms are witnessing a notable abundance of production during the current harvest season, amid favorable climatic conditions that have contributed to improved crop quality and increased quantities. Taif Governorate is home to more than 910 farms, comprising around 1.14 million rose shrubs, which produce approximately 550 million roses annually during a season lasting around 45 days.

Rose farms are spread across the highlands of Al-Hada and Al-Shafa, between the slopes of the Sarawat Mountains, in a natural setting characterized by moderate temperatures and abundant water, with fertile valleys that create an ideal environment for Taif roses, SPA reported.

Farmer Khalaf Jaber Al Tuwairqi stated that moderate weather and the availability of irrigation sources contributed to increased flower density and quality this season, thereby positively impacting harvesting and production. He noted that farms produce thousands of roses daily during peak periods, with around 12,000 roses required to produce one unit of rose oil, one of the world's most precious aromatic oils.

Tourism guide Abdullah Al Zahrani affirmed that the abundant rose production has boosted tourism activity in Taif, as rose farms in Al-Hada and Al-Shafa attract growing numbers of visitors during the harvest season to witness harvesting and distillation stages and learn about this traditional craft that forms part of the governorate's agricultural identity.

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Artemis Astronauts to Study the Moon’s Surface Using Mainly Their Eyes

This photo provided by NASA shows the moon seen from a window on the Orion spacecraft Integrity during the Artemis II mission on Friday, April 3, 2026. (NASA via AP)
This photo provided by NASA shows the moon seen from a window on the Orion spacecraft Integrity during the Artemis II mission on Friday, April 3, 2026. (NASA via AP)
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Artemis Astronauts to Study the Moon’s Surface Using Mainly Their Eyes

This photo provided by NASA shows the moon seen from a window on the Orion spacecraft Integrity during the Artemis II mission on Friday, April 3, 2026. (NASA via AP)
This photo provided by NASA shows the moon seen from a window on the Orion spacecraft Integrity during the Artemis II mission on Friday, April 3, 2026. (NASA via AP)

More than 50 years after humans first flew around the Moon, Artemis astronauts will repeat the feat on Monday and use the most basic instrument to study it: their eyes.

Despite the technological advancements since the Apollo missions, NASA still relies on the eyesight of its astronauts to learn more about the Moon.

"The human eye is basically the best camera that could ever or will ever exist," Kelsey Young, the lead scientist for the Artemis 2 mission, told AFP.

"The number of receptors in the human eye far outweighs what a camera is able to do."

Although modern cameras may be superior to human eyesight in some respects, "the human eye is really good at color, and it's really good at context, and it's also really good at photometric observations," Young said.

Humans can understand how lighting changes surface details, like how angled lighting reveals texture but reduces visible color.

In just the blink of an eye, humans can detect a subtle color shift and understand how lighting changes the contours of a landscape like the Moon's surface, details which are scientifically useful but difficult to ascertain from photos or videos.

Artemis 2 astronaut Victor Glover, who pilots the Orion spacecraft, said before liftoff this week that eyes were a "magical instrument."

- Field scientists -

To ensure they made the most of their proximity to the Moon, the four Artemis 2 crew members underwent more than two years of training.

Young said the goal was to turn the astronauts into "field scientists" via a combination of classroom lessons, geological expeditions to Iceland and Canada, and multiple simulated flybys of the Moon, just like the mission they are on.

The three American astronauts -- commander Reid Wiseman, pilot Glover and mission specialist Christina Koch -- along with Canadian astronaut Jeremy Hansen, all had to memorize the Moon's "Big 15," or the 15 features of the Moon that will allow them to orient themselves.

Using an inflatable Moon globe, they practiced seeing how the angle of the sun changed the colors and textures of the lunar surface, honing their observation and note-taking skills for the big moment.

"I can tell you, they are excited and they are ready," Young said with a smile.

- 'About the size of a basketball' -

The Artemis astronauts' mission is to study certain lunar sites and phenomena as part of 10 objectives chosen by NASA and ranked in priority order based on scientific interest.

During the Moon flyby, which will last for several hours, the crew will have to observe the celestial body with their naked eyes, along with cameras they have on board.

Noah Petro, head of NASA's planetary geology lab, told AFP that the Moon will look to the astronauts "about the size of a basketball held at arm's length."

"The question I'm most interested in is, are they going to be able to see color on the lunar surface," Petro said.

"I don't mean rainbow colors, but you know, dark browns or tan colors because that tells us something about the composition, and that tells us something about the history of the Moon."

David Kring of the Lunar and Planetary Institute told AFP he is not expecting any earth-shattering discoveries because of the multiple lunar probes and high-resolution images of the Moon taken since the Apollo missions.

Nevertheless, "having astronauts describing what they're seeing... That is an occurrence that at least two generations of people on Earth have never heard before," he said.

The Artemis 2 flyby will be broadcast live by NASA, save for a period for when the spacecraft is behind the moon.

"Just listening to their practice descriptions in the mission simulations... It brings chills up my arms," Young said.

"I am absolutely confident that these four people are going to deliver some incredible descriptions."