What is the scientific explanation for the cold temperatures in temples, especially in India?

 Step barefoot into a traditional Indian temple on a scorching 40°C (104°F) day, and it feels like an air-conditioned room. This dramatic chill is a masterclass in ancient thermodynamics.

The primary mechanism at work is thermal mass. Historic temples are constructed from dense, heavy stone, such as granite, sandstone, basalt, or marble. These materials have a high specific heat capacity, meaning it takes a tremendous amount of energy to change their temperature. During the day, the thick stone walls absorb the sun's radiant heat very slowly, preventing it from penetrating the interior. By the time the stone absorbs enough heat to warm up, the sun has set, and the walls radiate that energy back out into the cooler night air.

The layout of a temple is intentionally designed as a series of thermal buffer zones. The outermost courtyards bear the brunt of the heat, while consecutive inner halls provide increasing shade. At the very center lies the garbhagriha (sanctum sanctorum). This innermost chamber typically has the thickest walls, the fewest openings, and is completely shielded from direct sunlight.

Above the garbhagriha sits the vimana or shikhara, a tall, tapering spire. These spires act as thermal chimneys. As the limited amount of warm air inside the temple rises, it moves up into the high ceilings of the spire. This upward movement creates a slight negative pressure below, drawing cooler air in through the lower, shaded entryways and corridors to create a continuous, gentle draft.

Water plays a crucial final role in lowering the ambient temperature. Traditional temples are built alongside large water tanks or stepwells (kalyanis), which pre-cool the breeze blowing into the complex. Inside, the stone floors are routinely washed with water, and thousands of visitors walk through barefoot, often with wet feet from mandatory washing stations at the entrance. As this surface water evaporates, it absorbs latent heat from the stone, chilling the floors to the point where they remain noticeably cool to the touch even at midday.

The interior of a traditional garbhagriha features massive stone columns and thick walls that isolate the central sanctum from external heat. Photo by iMahesh is licensed under CC BY-SA 4.0.

Is Mars too cold to live on?

 Mars is a freezing world where carbon dioxide falls as dry ice snow. Yet for an astronaut walking outside, the biggest temperature threat isn't freezing to death—it's heatstroke.

The planet orbits about 50 million miles further from the sun than Earth, receiving significantly less solar energy. Compounding this distance is an atmosphere roughly 100 times thinner than Earth’s. This thin gaseous envelope cannot trap heat via a strong greenhouse effect. While a summer day near the Martian equator can reach a comfortable 70°F (20°C) at noon, the lack of atmospheric insulation means that as soon as the sun sets, temperatures plummet. Nighttime at the poles can drop to -220°F (-140°C).

However, that same thin atmosphere changes how cold actually behaves. On Earth, dense air or water rapidly pulls heat away from the body through conduction and convection. Because the Martian atmosphere is nearly a vacuum, it lacks the molecular density to efficiently steal heat. If a person stood outside on Mars, they would lose body heat much slower than they would on a severe winter day in Antarctica.

Because of this, the human body—acting as a 100-watt furnace at rest—quickly becomes a liability. A pressurized spacesuit is essentially a specialized thermos. With so few atmospheric molecules outside to carry heat away, internal life-support systems have to actively pump excess heat out of the suit to keep the wearer safe during physical exertion.

Designing structures to survive the cold is a highly understood science. Researchers have lived for decades in Antarctica’s Amundsen-Scott South Pole Station, managing temperatures that regularly drop to -100°F. Martian habitats will use heavy insulation and active heating systems, relying on the near-vacuum outside to act as a highly effective insulating layer.

While Mars is far too cold to live on unprotected, engineering can easily mitigate the extreme temperatures. The real barriers to long-term settlement are not the chilling nights, but unshielded cosmic radiation, toxic perchlorate compounds in the soil, and the total lack of breathable oxygen.

An illustration of a conceptual Mars base featuring pressurized human habitats. Source: Wikimedia Commons.

Are cold showers healthy?

 It could be beneficial to run out of hot water when taking a shower. Even a brief cold shower can serve as cold therapy to promote healing, recuperation, and overall well-being, particularly following physical activity.

Cold therapy, also called cryotherapy, uses exposure to cold temperatures to cool the body’s tissues for therapeutic reasons. There are several ways to apply cold therapy, including:

• Cold showers, which involve lowering the water temperature below 60 degrees for two to three minutes at a time
• Cold spray, used to numb a small area
• Cold water immersion or ice baths, or submerging everything but your head and neck in cold water
• Localized ice application to treat injuries or specific muscle groups
• Whole-body cryotherapy, which exposes the body to very cold vapors

1. Increase your resistance to colds

Going from a hot to cold shower even for a couple of minutes might protect you from circulating viruses. Leukocytes, the blood cells that fight off infection, can be stimulated by the shock of cold water. People who took cold showers for 30, 60, or 90 seconds for 90 days reported missing work 29% less frequently than those who didn't.

There is little information on how cold water therapy affects depression. However, the available research yields some encouraging findings. Participants in one clinical trial reported fewer symptoms of depression after taking daily cold showers for several months. Cold water may improve your mood and reduce anxiety, according to more studies.

2. Fight depressive symptoms

Your body goes into "survival mode" in cold water, exerting great effort to keep its core temperature stable. Your body is stimulated to boost blood flow and circulation as a result. Increasing circulation helps those with high blood pressure or diabetes by redistributing blood and delivering freshly oxygenated blood to parts of the body that need to heal. Over time, your circulatory system may become more effective and carry blood around the body more quickly.

3. Boost blood flow

4. Reduce inflammation and prevent muscle soreness

Cold temps make your blood vessels tighten up (vasoconstrict). When that happens, blood moves to your body’s core and vital organs. The blood naturally becomes oxygen- and nutrient-rich during the process.

5. Relieve localized pain

Cold therapy alleviates pain by reducing inflammation. But it also interferes with your brain’s perception of the pain.

Health considerations before taking cold showers

• Cold urticaria (hives), a skin reaction to cold exposure

• Heart disease, since a shock of cold may put added stress on the heart
• Raynaud’s syndrome, which causes numbness in your fingers and toes in response to cold temperatures

Could sitting down and sipping water actually save your organs? And Is drinking cold water the wrong way silently harming your body?

 *Cold water kills the vagus nerve*

🥛 There is a nerve in the human body called the vagus nerve, and this nerve is connected to both the stomach and the heart and is called the vagus nerve. If a violent stimulus reaches this nerve, such as cold water thrown at the stomach, which is a severe stimulus, then this nerve can stimulate the heart and stop it from functioning.

🥛 There are many cases of sudden death due to: a very strong stimulation of this vagus nerve, what scientists have called (nerve inhibition) that leads to cardiac arrest and sudden death can occur.

*Another thing:*

🥛 When a person is in a state of extreme heat and a lot of effort, it is like a machine. If water is poured on metal machines while they are under great stress and heat, they would crack and split, what happens to a person? Drink water while sitting and drink it in three sips.

🥛 It has also been scientifically proven that the liver is responsible for detecting thirst, and when drunk in one go, water suddenly falls to the liver, causing liver fibrosis. However, if it is done three times, the first one works to warn the liver and notify it that water is coming, so it prepares it by moistening and softening it and does not cause erosion in it. It is a scientific fact.

🥛 So drink water while sitting so that all the harmful deposits are flushed out of your body, including the deposits that cause kidney stones. As for drinking three times, every time you drink and stop to breathe, the body takes in oxygen and gives insulin to the body, and insulin protects against diabetes.

ಶೀತ , ಜ್ವರ ಮತ್ತು ಕೆಮ್ಮು

*1. ಪುದೀನ ಮತ್ತು ಶುಂಠಿಯ ಸಾರವು ಯಾವುದೇ ರೀತಿಯ ಜ್ವರದಲ್ಲಿ ಉಪಯುಕ್ತವಾಗಿದೆ. ನಾವು ಅದರಲ್ಲಿ ಮೆಂತ್ಯ ಮತ್ತು ಜೇನುತುಪ್ಪವನ್ನು ಸಹ ತೆಗೆದುಕೊಳ್ಳಬಹುದು.*

*2. ತುಳಸಿ ಎಲೆಗಳ ಕಷಾಯವನ್ನು ಏಲಕ್ಕಿ ಪುಡಿ ಮತ್ತು ಸಕ್ಕರೆಯೊಂದಿಗೆ ಬೆರೆಸಿ ಸೇವಿಸಿದರೆ ಜ್ವರ ಕಡಿಮೆಯಾಗುತ್ತದೆ.*

*3. ನೆಗಡಿಯೊಂದಿಗೆ ಜ್ವರವಿದ್ದರೆ ಅರ್ಧ ಚಮಚ ಓಂ ಕಾಳನ್ನು ಸೇವಿಸಿದರೆ ಚಳಿಯ ತೀವ್ರತೆ ಕಡಿಮೆಯಾಗುತ್ತದೆ ಮತ್ತು ಬೆವರಿನಿಂದ ಜ್ವರ ಕಡಿಮೆಯಾಗುತ್ತದೆ.*

*4. ಶೀತ, ಜ್ವರ, ನೆಗಡಿ ಮತ್ತು ದೇಹದ ನೋವು ಇದ್ದರೆ, ದಾಲ್ಚಿನ್ನಿ ಕಡ್ಡಿ,ಶುಂಠಿ, ಲವಂಗ, ನಿಂಬೆಹುಲ್ಲು ಚಹಾವನ್ನು ದಿನಕ್ಕೆರಡು ಬಾರಿ ಸೇವಿಸಿದರೆ ಜ್ವರ ಕಡಿಮೆಯಾಗುತ್ತದೆ.*

*5. ಬೇಲ್ಫಲದ ಪುಡಿಯನ್ನು ನೀರಿನಲ್ಲಿ ಬೆರೆಸಿ ಜ್ವರವನ್ನು ಕಡಿಮೆ ಮಾಡಲು ಬಳಸಲಾಗುತ್ತದೆ.*

*6. ಒಣದ್ರಾಕ್ಷಿ ತಿನ್ನುವುದು ಜ್ವರದಲ್ಲಿ ಉಪಯುಕ್ತವಾಗಿದೆ. ನೀರಿನಲ್ಲಿ ನೆನೆಸಿದ 20 ರಿಂದ 25 ಒಣದ್ರಾಕ್ಷಿ ಸೇರಿಸಿ. ಅದನ್ನು ಪುಡಿಮಾಡಿ ಮತ್ತು ಅದಕ್ಕೆ ನಿಂಬೆ ರಸವನ್ನು ಸೇರಿಸಿ. ಈ ಮಿಶ್ರಣವನ್ನು ದಿನಕ್ಕೆರಡು ಬಾರಿ ತೆಗೆದುಕೊಳ್ಳಿ.*

*7. ಸೇಬು, ಖಿಚಡಿ, ಟೊಮೆಟೊ ಸೂಪ್, ಶುಂಠಿ, ಬೆಳ್ಳುಳ್ಳಿ, ಕರಿಮೆಣಸು, ನುಗ್ಗೆ, ಕರಿಬೇವು ಇವುಗಳನ್ನು ಆಹಾರದಲ್ಲಿ ಸೇರಿಸಿಕೊಳ್ಳಬೇಕು.*

*8. ಒಂದು ಕಪ್ ಕುದಿಯುವ ನೀರಿಗೆ ಸ್ವಲ್ಪ ತಾಜಾ ತುಳಸಿ ಎಲೆಗಳನ್ನು ಸೇರಿಸಿ. ಈ ಮಿಶ್ರಣವನ್ನು 5 ರಿಂದ 10 ನಿಮಿಷಗಳ ಕಾಲ ಚೆನ್ನಾಗಿ ಕುದಿಯಲು ಬಿಡಿ. ಇದನ್ನು ಸೋಸಿಕೊಂಡು ದಿನಕ್ಕೆರಡು ಬಾರಿ ಕುಡಿಯಿರಿ. ಈ ಸಾರವು ಮಲೇರಿಯಾ, ಡೆಂಗ್ಯೂ ರೋಗಿಗಳಿಗೆ ಪ್ರಯೋಜನಕಾರಿಯಾಗಿದೆ. ಇದು ಜ್ವರವನ್ನು ಕಡಿಮೆ ಮಾಡುತ್ತದೆ.*

*9. ಜ್ವರದಲ್ಲಿ ಸಾಕಷ್ಟು ನೀರು ಕುಡಿಯುವುದು ಪ್ರಯೋಜನಕಾರಿ. ಇದರೊಂದಿಗೆ ಕಿತ್ತಳೆ ಮತ್ತು ಮೋಸಂಬಿ ರಸವನ್ನು ಸೇವಿಸುವುದರಿಂದ ಜ್ವರದಲ್ಲಿಯೂ ಪರಿಹಾರ ದೊರೆಯುತ್ತದೆ.*