New posts in Math History

Is there any conjecture that has been proved to be solvable/provable but whose direct solution/proof is not yet known?

Vladimir Arnold on formal thinking

Why are some coins Reuleaux triangles?

Why do we need so many trigonometric definitions?

Why are there two separate branches of calculus?

How was the integral formula for the binomial coefficient discovered?

Problem of Mary Somerville and Hypatia

Did Grothendieck acknowledge his collaborators' intellectual contributions?

Why did nobody prove undecidability by the "too many problems" argument?

What is the significance of deciding the convention of $1 \text{ radian} = 180 \text{ degrees}$ over $\pi$?