- Century of Physics, A
 - Timeline presenting the story of physics in the 20th century: the people, ideas, and things. In celebration of the 100th birthday of the American Physical Society. - History of High-Energy Astrophysics
- A list of many important dates in the history of high-energy astrophysics and astronomy in general, with links to further details.
- Sciencetimeline.net
- Offers a brief, interesting, and informative science timeline.
- timelinescience
- Provides a unique way of exploring how our way of understanding the world has changed in the last 1000 years ¿ from unquestioning religious belief to scientific rigour.
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