European Union member states sovereignty key powers

EU states retain control of key powers

The European Union uses qualified-majority voting for some decisions, but its member states retain sovereignty over treaty changes, armed forces, taxation and whether to leave. That mix means the EU is neither a conventional confederation nor a federal state.

Mexico adopted an Aztec symbol after independence

After independence, Mexico adopted the eagle on a cactus from Aztec tradition as a national emblem. At the same time, some conservative elites rejected positive views of the country’s pre-Spanish past and opposed its living Indigenous peoples.

A faint radio hiss became evidence for the Big Bang

In 1964, radio astronomers found a faint signal coming from every direction in the sky. Its temperature was only about 3 kelvin, and it matched predictions for leftover radiation from the early universe. The mysterious hiss became major evidence for the Big Bang.

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European Union member states sovereignty key powers

EU states retain control of key powers

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