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WildWinds is a reference and attribution resource for ancient numismatics, covering Roman, Greek, Byzantine and Celtic coins. Coins in its database are not offered for sale on the site. The site provides a database of coin types with attributions and references.
Philosophy Stack Exchange is a question-and-answer site for those interested in the fundamental nature of knowledge, reality, and existence. It is part of Stack Overflow's open communities, and the help center documents asking, answering, reputation, moderation, badges and review queues.
The Tree Proof Generator is a web tool that accepts formulas of standard propositional, predicate or modal logic and tries to find either a countermodel or a tree proof, also called a semantic tableau. It supports classical propositional logic, first-order predicate logic with functions and identity, and a few normal modal logics.
The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work. It offers a table of contents, archives and random entry browsing, with editorial information and citation guidance.
The Virus Encyclopedia is a Wikidot wiki that anyone can edit, currently holding hundreds of entries about computer viruses and worms. It covers viruses, worms and related malware, with pages on individual threats and groups, plus help pages about entry layout and wiki syntax. A featured entry describes the Navidad mass-mailer worm.
Climate.us is an independent, nonprofit website presenting climate data and news. It features a Global Climate Dashboard tracking indicators such as Arctic sea ice, carbon dioxide, mountain glaciers, greenhouse gases, ocean heat and sea level over time, alongside news and feature articles.
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WildWinds is a reference and attribution resource for ancient numismatics, covering Roman, Greek, Byzantine and Celtic coins. Coins in its database are not offered for sale on the site. The site provides a database of coin types with attributions and references.
Philosophy Stack Exchange is a question-and-answer site for those interested in the fundamental nature of knowledge, reality, and existence. It is part of Stack Overflow's open communities, and the help center documents asking, answering, reputation, moderation, badges and review queues.
The Tree Proof Generator is a web tool that accepts formulas of standard propositional, predicate or modal logic and tries to find either a countermodel or a tree proof, also called a semantic tableau. It supports classical propositional logic, first-order predicate logic with functions and identity, and a few normal modal logics.
The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work. It offers a table of contents, archives and random entry browsing, with editorial information and citation guidance.
The Virus Encyclopedia is a Wikidot wiki that anyone can edit, currently holding hundreds of entries about computer viruses and worms. It covers viruses, worms and related malware, with pages on individual threats and groups, plus help pages about entry layout and wiki syntax. A featured entry describes the Navidad mass-mailer worm.
Climate.us is an independent, nonprofit website presenting climate data and news. It features a Global Climate Dashboard tracking indicators such as Arctic sea ice, carbon dioxide, mountain glaciers, greenhouse gases, ocean heat and sea level over time, alongside news and feature articles.
