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13,000 Years Ago, a Firestorm Covered 10% of Earth’s Surface, Triggering an Ice Age

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13,000 Years Ago, a Firestorm Covered 10% of Earth’s Surface, Triggering an Ice Age

13,000 years ago, a fire covered 10% of the Earth’s surface, triggering an ice age
As dust clouds enveloped the planet, they started a mini ice age, keeping the planet cool for another thousand years, just as it emerged from the 100,000 years covered by glaciers. Once the fire is out, life can start all over again.

“The hypothesis is that a large comet broke up and hit Earth, causing the catastrophe,” said Adrian Melott of the University of Kansas, who co-authored a 2018 study detailing This catastrophic event is presented.

“Many different chemical signatures — carbon dioxide, nitrates, ammonia and others — seem to indicate that 10 percent of Earth’s land surface, or about 10 million square kilometers (3.86 million square miles), was consumed by fires.”

To review the burning flames and shockwaves of this major event, a team of 24 scientists measured numerous geochemical and isotopic signatures from more than 170 locations around the world.

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One analysis was conducted on patterns of pollen levels, which showed that pine forests were suddenly burned and replaced by poplars – a species that specializes in covering barren land, like your planet being hit by a series of giant fireballs.

In fact, parts of comets that disintegrate in space may still be floating around our solar system 13,000 years from now.

The samples the researchers analyzed also found high concentrations of platinum (often found in asteroids and comets) and dust, as well as increased concentrations of combustion aerosols, and if a lot of biomass is burning, you’ll find: ammonium, Nitrates, and others.

Plants died, food sources became scarce, and the previously retreating glaciers began to advance again, the team noted. Human cultures would have to adapt to harsher conditions, and as a result population declines.

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“Calculations suggest that this effect depletes the ozone layer, leading to an increase in skin cancer and other negative health effects,” Melott said.

The team hypothesized that such a widespread impact of cometary debris, and the storms that followed, was responsible for the extra cooling known as the Young Andromeda period. This relatively brief change in Earth’s temperature is sometimes attributed to changes in ocean currents.

However, comet impacts are not an entirely new idea, although this recent study went a long way in trying to find evidence for it. Scientists have debated for years whether the comet impact sparked the Younger Dryas event.

Not everyone agrees that the data points to a cometary impact, but this comprehensive work lends more support to the hypothesis, like ancient carvings discovered in Turkey in 2017 that depict devastating impacts from interstellar objects .

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“The impact hypothesis is still a hypothesis, but this study provides a wealth of evidence that we think can only be explained by significant cosmic impacts,” Melott said.

The research has been published here and here in the Journal of Geology.

Complete News Source – SCIENCE ALERT

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Train smarter, not harder: How taking occasional breaks from gym can revolutionise your fitness routine

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1 day ago

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November 21, 2024

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Train smarter, not harder: How taking occasional breaks from gym can revolutionise your fitness routine

Taking regular breaks from intense training, like deload weeks, helps your body recover, preventing fatigue and injury, and ultimately boosts fitness gains.

When it comes to getting fit, the idea of spending hours at the gym might come to mind, but many fitness experts argue that taking a “deload week” every six to eight weeks is actually key to improving your fitness gains. A deload week involves reducing the intensity of workouts to allow the body to recover from the fatigue and muscle damage caused by intense training.

While high-intensity training helps build strength and fitness, it can also lead to muscle strain, and without adequate recovery, these gains can’t fully materialise. Deload weeks give the body much-needed rest to repair and rebuild, ensuring continued progress. (Also read: Bhagyashree swears by this super easy exercise for instant leg pain relief and better mobility. Watch how to do it )

Why recovery is key for muscle growth

According to an article by The Conversation, intense exercise can cause tiny tears in muscle fibres, leading to inflammation that requires rest or low-intensity exercise to heal. This inflammation is essential for muscle growth and fitness improvements. However, without proper recovery, muscles remain in a state of slight damage, preventing inflammation from resolving. This chronic state of inflammation can hinder muscle function, reducing oxygen efficiency and impairing performance. Giving muscles time to recover through rest ensures they repair properly and are primed for continued progress, setting us up for greater success in our fitness journey.

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Many gymgoers fear taking time off and are worried it will lead to a loss of gains. However, research shows that muscle genes have a “memory imprint,” which keeps them in a semi-prepared state. This allows muscles to respond more quickly and effectively to future training, promoting growth after a rest period. Even after extended periods of reduced intensity, up to seven weeks, muscular fitness can be restored to prime condition—and in some cases, surpass previous levels. Interestingly, recovery can occur twice as fast as it took to reach peak fitness initially, even if some strength is lost.

Taking time off from intense training is crucial to prevent muscle soreness and avoid overtraining syndrome. Overtraining occurs when the body doesn’t get enough rest, leading to prolonged fatigue, decreased performance, and mood disturbances. Symptoms develop gradually, making overtraining difficult to recognize until it’s severe. Rest is essential to avoid these issues and ensure long-term progress in training.

Role of overtraining syndrome and deload weeks

Overtraining syndrome is challenging to quantify due to its vague symptoms. Studies suggest it may affect as few as 10% of elite athletes, though rates could climb to 60% among highly competitive individuals. Recovery is essential for both fitness and overall health. When engaging in heavy gym routines, it’s vital to incorporate sufficient recovery time into your workout plan. Unlike rest days, which involve little to no exercise once or twice a week, deload weeks feature lighter training at reduced intensity—typically about 50% fewer workouts or a 20% drop in workout intensity.

Both rest days and deload weeks are essential for recovery and crucial to improving fitness. It’s not about choosing one over the other—they complement each other. For instance, intense training for marathons, Ironman, or CrossFit competitions requires weekly rest days alongside scheduled deload weeks. However, for recreational gym-goers exercising 1–3 times weekly at a moderate intensity, the recovery from this routine is often sufficient without the need for additional deload weeks.

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Fitness influencers recommend incorporating deload weeks into training schedules every 4–8 weeks, aligning closely with the expert advice of 4–6 weeks. However, it’s crucial to listen to your body and schedule deload weeks as needed. If your performance plateaus or worsens, it may signal time for a deload. Training plans should be flexible enough to allow rest when required. Deload weeks not only enhance performance but also support overall health.

Disclaimer: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

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