Something mysterious happened nearly half a billion years ago that triggered one of the most important changes in the history of life on Earth. Suddenly, there was an explosion of species, with the ...
Collecting meteorites on Earth is often described as the cheapest form of space exploration. Scientists now have over five ...
Scientists at MIT and elsewhere have discovered extremely rare remnants of "proto Earth," which formed about 4.5 billion years ago, before a colossal collision irreversibly altered the primitive ...
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