Quanta Magazine1d
How a Problem About Pigeons Powers Complexity Theory
When pigeons outnumber pigeonholes, some birds must double up. This obvious statement — and its inverse — have deep ...
Birds & Blooms on MSN2d
Mystery Bird: Why Does This Pigeon Have Pink Feathers?
Why is this pigeon pink? We break down the mystery — plus, birding experts advise what to do if you see a pink bird that ...