The last time you scrubbed a streaky window or polished a porcelain appliance, you probably used a chemical called ammonia.

Stable isotopes are alternative forms of elements with different molecular weights that are found naturally and do not decay radioactively. Stable isotope analysis of elements such as carbon, nitrogen ...

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My Wife Asked My Permission to Sleep With Her Best Friend. I Thought My Saying No Would Be the End of It. Oh Boy.