Скачать или смотреть Relaxing door video- Day 185

Random fact of the day:

Glass is actually a liquid… but an extremely slow-moving one.

Scientifically, most common glass (like window glass) is considered an amorphous solid—meaning its molecules are not arranged in a regular crystal structure like most solids. Instead, they’re arranged more like a frozen liquid.

Because of this structure:
• Glass doesn’t have a true melting point like crystalline solids.
• It gradually softens as temperature increases.
• Its internal structure resembles a liquid that stopped flowing before crystallizing.

You might have heard the myth that old windows are thicker at the bottom because the glass flowed downward over centuries. That’s actually not true—the uneven thickness comes from old manufacturing methods, not gravity.

But the structure still explains why glass behaves strangely compared to normal solids.

🧠 Bonus fact:
If you drop a glass object, the cracks propagate at speeds of over 1500 km/h, which is why glass shatters so explosively.

If you want, I can also tell you:
• why Roman glass sometimes changes color after 2000 years, or
• why Prince Rupert’s Drops can survive a hammer blow but explode from a tiny crack.

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