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Physics and Mathematics


  1. Alternative theories

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

  • 3455 topics
  • 52116 replies
Doppler Effect Exists Anywhere - last post by TonyYuan2020

Astronomy and Space

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

  • 1377 topics
  • 24689 replies
Can astrology have a scient... - last post by jack99

Engineering and Applied Science

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

  • 307 topics
  • 2805 replies
Wet Computers - last post by Flummoxed