Physics & astronomy
A physical model links measured quantities to predictions that can fail.
Start here
Introduction to Physics & astronomy
How do observations constrain a physical model?
Choose a direction
Thermodynamics & entropy
Why does time have an arrow?
Quantum foundations
What does quantum theory describe?
Complex systems
How does order emerge from interaction?
Motion and measurement
How can we distinguish position from velocity?
Stars and observation
How can light tell us about a distant star?
Read a thinker or author
Connect this subject
What does energy explain about life?
Study metabolism, cell evolution and bioelectric organisation, while keeping physical measurements distinct from proposed historical explanations.
When does a pattern become an explanation?
Compare symmetry, information and models across mathematics, physics and living systems. Similar vocabulary does not establish identical mechanisms.