Instructions A complex number is expressed in the form z = a + b * i, where: a is the real part (a real number), b is the imaginary part (also a real number), and i is the imaginary unit satisfying ...

A team of Penn State researchers has used a new 3D-printing method to produce a complex metal build that was once only ...

The process of catalysis—in which a material speeds up a chemical reaction—is crucial to the production of many of the ...

When pigeons outnumber pigeonholes, some birds must double up. This obvious statement — and its inverse — have deep ...

A new suggestion that complexity increases over time, not just in living organisms but in the nonliving world, promises to ...