It basically means removal;excision;resection
4.6 billion years ago
The study pushes back the clock on the origin of Earth's water by hundreds of millions of years, to around 4.6 billion years ago, when all the worlds of the inner solar system were still forming. Scientists had suspected that our planet formed dry, with high-energy impacts creating a molten surface on the infant Earth.
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<span>In the controversial scientific process of cloning, organisms are created that are genetically identical to the parent. This process would be classified as </span>asexual reproduction.
Asexual reproduction is a type of reproduction involving only one parent, in which the offspring inherits the genes of that one parent, very similar to cloning.
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