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Physics / Math / Engineering


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Physics and Mathematics


  1. Alternative theories

Formulae, ideas, theories, speed of light, black holes...

  • 3035 topics
  • 44281 replies
A Grand Unifying Counter Co... - last post by Super Polymath

Astronomy and Space

Space, Human spaceflight, space probes and the exploration of our Solar System. No personal theories or speculation please.

  • 1308 topics
  • 24140 replies
Water Vapor In Space - last post by hazelm

Engineering and Applied Science

The art of applying science to specific problems. Materials, construction, technical issues and related topics.

  • 282 topics
  • 2608 replies
Why Does The System Pressur... - last post by exchemist