Subject: A new type of jet engine could revive supersonic air travel - The Economist | How scientists went to an asteroid to sample the Sun - The Economist | Why chinstrap penguins sleep thousands of times a day - The Economist | Do rising methane levels herald a climate feedback loop?

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From	Special Dispatch <[email protected]>
Subject	A new type of jet engine could revive supersonic air travel - The Economist \| How scientists went to an asteroid to sample the Sun - The Economist \| Why chinstrap penguins sleep thousands of times a day - The Economist \| Do rising methane levels herald a climate feedback loop?
Date	January 1, 2024 3:52 AM

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