OpenAI now accepting ChatGPT app submissions from third-party devs, launches App Directory

OpenAI has begun accepting submissions from third-party developers for their apps to be accessible directly in ChatGPT, and has launched a new App Directory (don’t call it a “store”!) that can be opened from the ChatGPT sidebar and at the URL chatgpt.com/apps. This means the 800 million+ users of OpenAI’s hit chatbot can search for,…

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Two Möbius Strips Combine to Create a Bizarre Object That Only Exists in 4D

December 18, 2025 3 min read Add Us On GoogleAdd SciAm Two Möbius Strips Combine to Create a Bizarre Object That Only Exists in 4D In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist By Manon Bischoff edited by Daisy Yuhas LAGUNA DESIGN/SCIENCE PHOTO LIBRARY/Getty Images Visually, the “Klein…

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