Matter

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Physics

Most of the matter in the universe is dark matter, which we can't see or directly interact with. elaborate share

Gravity

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Physics

Lab-grown meat, or cultured meat, uses significantly less land and water than traditional livestock farming. elaborate share

Waves

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Physics

Waves can be found not just in water, but also in light, sound, and even earthquakes. elaborate share

Superconductors

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Physics

Some superconductors, when cooled below their critical temperature, exhibit the Meissner effect, completely expelling magnetic fields from their interior. elaborate share

Thermodynamics

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Physics

The efficiency of a heat engine is fundamentally limited by the temperatures at which it operates; you can never completely convert heat into work. elaborate share

Wormholes

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Physics

Wormholes, if they exist, could potentially allow for faster-than-light travel, but traversing one might require navigating exotic matter with negative mass-energy density – a substance we've never observed. elaborate share