The first Soviet high-altitude nuclear test «K-1», 1.2 kilotons, conducted at an altitude of 150 km at the Sary Shagan test site in the Kazakh SSR, 1961. Declassified never seen before photos.

You accidentally swallow a sharp FISH BONE and feel it stuck in your throat. What is the first SAFEST thing to do? A) Eat a large piece of dry bread B) Drink water or cough gently C) Swallow a whole banana D) Stick your finger down your throat

Eigenvalues do not always tell the whole story of the matrix. For normal matrices the pseudo-spectrum reveals hidden regions where tiny changes can produce surprisingly large responses.

Step into the craziest visualization of the fourth dimension you have ever seen

When a sound wave turns into light: the unsolved mystery of sonoluminescence

Visible transonic effects on the F-35.

Zirconium is nearly transparent to neutrons, which makes it the perfect metal to clad nuclear fuel. But it has an evil twin, and the two are the closest pair of elements in the periodic table. In every ore on Earth, zirconium comes locked together with hafnium. Hafnium absorbs neutrons six hundred times more than zirconium does, which is enough to ruin the economics of a nuclear reactor. Hafnium is so identical to zirconium that for decades no process could separate them. Hafnium sits directly below zirconium on the periodic table, so it should be a bigger atom, but on the way there you pass through the 14 lanthanides, each adding a proton to the nucleus and an electron to a buried 4f orbital that barely shields the outer shell. The extra nuclear pull shrinks the atom by almost exactly the amount the new shell added. This identical size and charge makes these two elements very similar chemically, which is why separating them is so hard. But in the late 1940s, government chemists worked out liquid-liquid extraction schemes that could finally pry the two apart at industrial scale. Zirconium alloys as a result have become a nuclear standard, and today every commercial water-cooled reactor on Earth wraps its fuel in zirconium that has been purified in this way. And the leftover hafnium still has a use in some reactors... in control rods, to intentionally stop the chain reaction!

DJI Mavic 3 Pro ​flying over Everest (8848.86 m). The drone ascended ~3,500 meters from the base camp to the summit of the highest mountain in the world.

Main problem with Raghuram Rajan's takes is he doesn't understand industry at all. He has treated iPhone & (now) semiconductors as pure capital plays. But as this DH article points out - there is substantial capacity building and local skilled talent required to be developed.

BREAKING: @DIU_x and Honeywell have successfully flown an aircraft for more than four hours from Seattle to Alaska over the Pacific without GPS, using quantum magnetic navigation. A major step toward GPS-independent navigation in jammed environments, with plans to demonstrate the technology on a U.S. military C-17 Globemaster III later this year.

After approx. 24 days at sea, the SpaceX Recovery team successfully guided Starship to a location just off the coast of Christmas Island. A team of SpaceX engineers is on their way to conduct additional analysis on the vehicle in calmer waters before attempting to return it to Starbase

PRAGYA is alive. 🇮🇳 India’s first private Tokamak ⚡️ #Pranos #Fusion #DeepTech #nuclearfusion