r/Science_India

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When gold comes into contact with mercury, something unusual begins almost instantly, the two metals can form an amalgam. Mercury, one of the few metals that remains liquid at room temperature, has the ability to bond with gold at a molecular level, breaking down its surface and mixing with it.

Instead of simply sitting on top, mercury can begin absorbing gold into itself, creating a soft, silvery paste like alloy. This reaction has been used historically in gold mining and extraction, where mercury helped separate gold from crushed ore.

But this process comes with serious danger. Mercury is highly toxic, and prolonged exposure can damage the brain, nervous system, and organs. In many parts of history, people used mercury for gold extraction without fully understanding the devastating health consequences.

Heating a gold mercury amalgam can evaporate the mercury, leaving gold behind, but this also releases poisonous mercury vapor into the air.

What seems like a fascinating scientific reaction is also a reminder that chemistry can be both useful and deadly. Gold may symbolize wealth, but when mercury enters the equation, the process can become dangerously toxic.

For about 18 years, a self-taught truck mechanic named Tim Friede in the United States let cobras, mambas, taipans and rattlesnakes bite him 202 times, and injected himself with their venom 856 times.

Once he took two cobra bites within an hour and slipped into a coma. Most experts called him reckless.

Then in 2025, scientists took a sample of his blood, isolated the antibodies, and produced something the world has never had: a single antivenom that works against 19 of the planet’s deadliest snakes.

The “Screaming Gummy Bear” demonstration works because gummy bears contain large amounts of sugar, which acts as a fuel source. When dropped into molten potassium chlorate (KClO₃), the compound rapidly decomposes and releases oxygen. The hot, oxygen-rich environment causes the sugar to oxidize extremely quickly, releasing a large amount of energy as heat, light, sound, and expanding gases. The reaction is so energetic because it combines a concentrated fuel source with a powerful oxidizer at high temperature.

Screaming Gummy Bear Reaction

Scientists created a highly detailed image of a human cell by combining real molecular data. They used methods like X-ray studies and electron imaging to place each tiny part correctly. The result looks almost like you are seeing inside the cell. The image feels cinematic but is based on real science, not imagination. It shows how different parts of the cell work together as a system. This helps people understand what is happening inside the body at a very small level. It reminds us that life is full of hidden complexity. When we can finally see these invisible details, it makes the human body feel even more amazing and real.

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The photoelectric effect is a fundamental phenomenon in physics where electrons are emitted from the surface of a material, typically a metal, upon exposure to light of sufficient frequency. Discovered by Heinrich Hertz in 1887 and later explained by Albert Einstein in 1905, it occurs when photons of light strike the material and transfer their energy to bound electrons; if the photon's energy (E = hv, where h is Planck's constant and v is the frequency) exceeds the material's work function (the minimum energy needed to free an electron), the electron is ejected with kinetic energy equal to the excess.

This effect challenged classical wave theory of light, as it demonstrated that emission depends on light's frequency rather than intensity-below a threshold frequency, no electrons are emitted regardless of brightness-and provided key evidence for the particle nature of light, earning Einstein the Nobel Prize in Physics in 1921 and laying the groundwork for quantum mechanics.

Everyone should watch this analysis of why and how our faith has caused our own rivers which we treat as God, to be catastrophically polluted.

More about Yamuna Pollution: https://www.thehindu.com/infographics/2026-03-02/yamuna-river-pollution-crisis/index.html#:\~:text=This%20means%20pollution%20of%20the,be%20even%20fit%20for%20bathing.&text=The%20water%20between%20Wazirabad%20and,river%2C%20as%20per%20official%20data.

Source: UnfakingIndia

India’s hypersonic program is gaining momentum as the DRDO’s Long-Range Anti-Ship Missile (LR-AShM) moves into Phase-II trials. Designed as a hypersonic glide weapon capable of reaching speeds up to Mach 10 (around 12,300 km/h, or roughly 10 times the speed of sound), it can strike both moving and stationary targets while following a maneuverable trajectory that makes interception extremely difficult. The missile is part of a broader push toward a multi-layered strike capability, combining ballistic, cruise, and hypersonic systems for different combat roles. With indigenous sensors, advanced avionics, and enhanced naval strike potential, LR-AShM marks a major step in strengthening India’s deterrence and next-generation warfare capabilities.

Video Source: @NewsIADN

Microscopic footage of two Stentor-large, trumpet-shaped single-celled protozoans interacting in the same sample.Their flexible bodies can stretch and deform, sometimes creating the illusion of one passing through another. A fascinating glimpse into the dynamic world of microbial life.

Credit: @desi_morrison

LEDs change color when submerged in Liquid Nitrogen. They produce light through Electroluminescence, where electrons recombine with holes and release energy as photons, and the color depends on the material’s Band Gap. At such low temperatures, the semiconductor’s band gap increases slightly, so the emitted photons have higher energy and shift toward shorter wavelengths causing visible color changes (for example, as seen here, yellow shifting toward green). Reduced thermal losses can also make the LED appear brighter and more efficient.

Says in India, Art Deco is architecture of the common man (as compared to displays of power in America) vs. neo-Gothic/neo-Classical structures

Also says that the rise of gated communities, the lack of integration with Navi Mumbai is hurting Mumbai's growth. Explains why it's impossible for India to create it's own national architectural style

Thoughts?

This video demonstrates the open siphon effect, where a liquid appears to pour itself out of a container without any tube. Unlike normal liquids, this fluid is viscoelastic, meaning it behaves both like a liquid and a stretchy solid, allowing it to form a continuous thread that doesn’t easily break. Once the flow starts, gravity pulls the liquid downward while its elasticity keeps the stream intact, letting it “pull” more fluid over the edge and sustain the flow through open air. The samples shown are a 0.5% solution of high molecular weight poly(ethylene oxide) (PEO) in water (red) and the same solution with added 45–60 nm silica nanoparticles (blue).

Used a mosquito racket circuit to get the high voltage for the geiger tube. Need to work on the CPM part as the reading fluctuates a lot.