fluid critical point milky light scattering

A fluid can turn milky at its critical point

At a fluid’s critical point, its density can fluctuate greatly. Those changes scatter light of every wavelength, making the fluid look milky white. Einstein linked this effect, called critical opalescence, to the kind of light scattering that explains the blue sky.

Continents are too light to easily sink under each other

When two continents collide, their crust is too light for either side to easily sink deep into the mantle. Instead, the edges are squeezed, folded, and pushed upward. This can build huge mountain ranges such as the Himalayas and Alps.

Jellyfish protein helps researchers track gene activity

Green fluorescent protein was first extracted from a bioluminescent jellyfish. Researchers adapted it as a fluorescent marker, letting them see which cells or tissues express a gene.

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fluid critical point milky light scattering

A fluid can turn milky at its critical point

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