Polar vortex sending Arctic air to US. Where will be coldest?

Windchill temperatures as low as minus 30 degrees are a risk to life, forecasters said.

Polar vortex expected to bring 'coldest air of the whole winter.' Will Tennessee feel it?

More dangerously cold air is on the way for much of the U.S. Will Tennessee be impacted? Here's what to know.
Opinion
Dot Physics on MSNOpinion

Lagrange multipliers made simple: Constraint forces in polar coordinates

Simplify complex physics and math concepts with this easy guide to Lagrange multipliers! In this video, we explain how to calculate constraint forces in polar coordinates using step-by-step examples ...
The Times of Northwest Indiana

Porter County police say they uncovered plot to make alleged murder look like self-defense

VALPARAISO — While the murder case against Karen Sons remains pending more than five years after the alleged offense, a man has been charged with assisting her in the wake of the crime.