Difference between revisions
arrow-of-time
Status and infobox
- status:
—→ open - kind:
—→ problem - year:
—→ 1876 - statement:
—→ Why did the universe begin in a state of such low entropy?
Source +15 −0
+---
+title: The arrow of time
+kind: problem
+status: open
+year: 1876
+statement: Why did the universe begin in a state of such low entropy?
+space: matter-in-motion
+---
+The laws of physics are nearly time-symmetric, and the second law explains the direction of time only given a low-entropy past. Why the early universe was so special, the past hypothesis, is a question for cosmology that physics has not answered.
+
+## Sources
+
+- [Wikipedia: Arrow of time](https://en.wikipedia.org/wiki/Arrow_of_time)
+
+[[Space:matter-in-motion|Fluids and many bodies]] · [[Continent:physics|Physics]]
Revision 96 as rendered
The laws of physics are nearly time-symmetric, and the second law explains the direction of time only given a low-entropy past. Why the early universe was so special, the past hypothesis, is a question for cosmology that physics has not answered.