Timelines under continual development by design.
Helpful maps for those who study the development of mathematics and science.
Chronologies Developed Here:
Statistical Mechanics
and Thermodynamics
Hypercomplex Numbers Electromagnetic Theory
Chronologies From Elsewhere:
Wikipedia Timelines Timelines from the ever-expanding Wikipedia
HistoryOfScience.com History of Science, Medicine, and Technology
Timeline Index Many timeline cross-sections of history. Lots of interesting timelines from way way back to the present.
Maps of War History maps and timelines of religion, conquest, governments, etc.
A Timeline of Symmetry in Physics, Chemistry, and Mathematics A very well-researched timeline that I very much recommend. Also contains links to biographies as I have done in my timelines. Great to see such resources.
A Timeline of Mathematics and Theoretical Physics Names and accomplishments in math and theoretical physics in the 20th century.
History Topics in Mathematics Historical chronologies of many areas of mathematics. Great stuff!
Chronology of Magnetospheric Exploration List of major events from 1600 to present, mostly in the 20th century, of course.
Timeline of Microcomputers Fun and detailed romp through the history of microcomputers.