To the moo-n: Cow dung fuels Japan's space ambitions

Japan's space industry opened potentially an udder-ly new chapter on Thursday with a start-up testing a prototype rocket engine that runs on fuel derived purely from a plentiful local source: cow dung.

Does more money correlate with greater happiness?

Are people who earn more money happier in daily life? Though it seems like a straightforward question, research had previously returned contradictory findings, leaving uncertainty about its answer.

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