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Physics and Mathematics


  1. Alternative theories

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

  • 2666 topics
  • 37254 replies
Why To Say Galaxies Could N... - last post by exchemist

Astronomy and Space

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

  • 1211 topics
  • 23076 replies
Shooting Stars - Meteor - last post by Abdelmoghit

Engineering and Applied Science

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

  • 247 topics
  • 2446 replies
Method Of Loading Carbon Mo... - last post by Herbid