Were galaxies much different in the early universe?

An array of 350 radio telescopes in the Karoo desert of South Africa is getting closer to detecting "cosmic dawn"—the era after the Big Bang when stars first ignited and galaxies began to bloom.

Speciesism, like racism, imperils humanity and the planet

With the world's population topping 8 billion last year, it's clear that humans have achieved a unique status in Earth's history. We are the only creature that dominate all other organisms on the planet, from animals and ...

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