Kısaca
Shape memory alloys can be bent and crushed, then return when heated. It is not magic, it is a phase change in the crystal structure.
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Kısaca
Shape memory alloys can be bent and crushed, then return when heated. It is not magic, it is a phase change in the crystal structure.
If DNA from one human cell were stretched out, it would approach 2 meters. The surprising part is how it is packed neatly into a microscopic nucleus.
The tongue of giraffes is purple and 50 cm long. This feature allows them to easily eat thorny acacia leaves.
Most of the universe may be invisible: dark matter emits no light, yet gives itself away through gravity. Galaxy rotation and lensing hint at an unseen ‘skeleton.’
The helium that lifts balloons is a ‘leaky’ gas for the planet. Being so light, it rises high, and some atoms gain enough speed to escape into space—Earth slowly loses it.
Some materials drop electrical resistance to zero at very low temperatures, letting current flow without loss. They also expel magnetic fields, producing the levitation-like Meissner effect.
−273.15°C looks like a target, but physics says you can approach it, not reach it. As you cool, the remaining energy is harder to remove; each step costs more and the wall retreats.
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