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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...

  • 2915 topics
  • 40734 replies
Can You Pinpoint A Photon O... - last post by Vmedvil

Astronomy and Space

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

  • 1280 topics
  • 23970 replies
Near Earth Objects - last post by LaurieAG

Engineering and Applied Science

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

  • 274 topics
  • 2578 replies
The Jet propulsion with clo... - last post by qumf