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Quantum principle allows heat to flow from cold to hot

Quantum principle allows heat to flow from cold to hot

Heat flows from hot objects to cold objects – or does it? Although unidirectional heat flow is a natural consequence of the second law of thermodynamics, which states that entropy must either increase or stay the same, an international team has experimentally demonstrated that a quantum mechanism can reverse this flow of heat while…

Slow spin could explain why planets become hellish

Slow spin could explain why planets become hellish

Hundreds of Venus-like planets could soon help determine why some worlds become sweltering greenhouse hellscapes while others remain capable of supporting life. But before answering that question, scientists first need to know how fast those planets are spinning.