T oday, I’m talking with Willem Avé, who’s head of product at Square. You know Square — it was started by billionaire Jack ...

A new equation calculates how many fragments of each size will be produced when an object breaks. The principle could help ...

New simulations reveal that the Milky Way’s odd split between two chemically distinct groups of stars isn’t a universal ...

Teaching 1st grade also means managing a lot of transitions—helping students move quickly and calmly from one activity to another, or giving them small “brain breaks” to move and stretch. At the ...