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Physics and Mathematics


  1. Alternative theories

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

  • 3317 topics
  • 50153 replies
Is This A Reactionless Drive? - last post by OverUnityDeviceUAP

Astronomy and Space

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

  • 1360 topics
  • 24505 replies
Building A Supermassive Bla... - last post by Flummoxed

Engineering and Applied Science

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

  • 299 topics
  • 2721 replies
Chemical Engineering And He... - last post by hazelm