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I ask a lot of questions.
"The search for truth is more valuable than its possession" ― Gotthold Ephraim Lessing.
Quaerite et Invenietis.
Physics
Q&A for active researchers, academics and students of physics
Stack Overflow
Q&A for professional and enthusiast programmers
Mathematica
Q&A for users of Wolfram Mathematica
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Super User
Q&A for computer enthusiasts and power users
Mathematics
Q&A for people studying math at any level and professionals in related fields
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Astronomy
Q&A for astronomers and astrophysicists
Academia
Q&A for academics and those enrolled in higher education
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Ask Ubuntu
Q&A for Ubuntu users and developers
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Quantum Computing
Q&A for engineers, scientists, programmers, and computing professionals interested in quantum computing
Engineering
Q&A for professionals and students of engineering