The process of opalization refers to something turning into an opal — like for example, a big part of this fossil. Opalized ammonite fossils are formed through a unique geological process ...
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NASA Finds Pure Quartz on Mars—Could This Be Proof of Ancient Life?NASA’s Perseverance rover has uncovered high-purity quartz crystals on Mars, a discovery that could reshape the search for ...
There are few fossils, but even they create controversy. The opal fields of Lightning Ridge in New South Wales have produced a few jaws and teeth of small monotremes. Steropodon and Kollikodon are ...
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