The Conservative party launched its biggest radio, TV and online ad campaign to date in Quebec You can save this article by registering for free here. Or sign-in if you have an account. OTTAWA ...

This page contains hints, solutions, and advanced challenges for our diffraction grating challenge. If you would like a grating (or a set for your class if you are a teacher), please contact us at ...

A magnificent Pictish stone that has stood for around 1,200 years and features some of the most impressive carvings of the era has been “massively damaged” after it blew over in the wind.

Stonehenge gets some well-deserved attention when it comes to British archeology. Between its age, altar stone’s epic journey, and potential origin as a community building initiative ...

What is causing investors to hit the sell button today? Let's find out. There have been a couple of catalysts for today's selling. The first is another pullback in oil prices overnight which is ...

A forum for contemporary philosophers and other thinkers on issues both timely and timeless. The series moderator is Simon Critchley, who teaches philosophy at The New School for Social Research.

There are all types of gutter guards. Good ones keep your gutters clean and can eliminate flooding and damage to your home. But Consumer Reports' tests find some don’t work well.

She’s referring to the plight of a 14-year-old with child who “becomes a problem for Dr. Turner [Stephen McGann] and the nurse,” teases Agutter, because her deeply religious family believes it’s an ...

Some believe that certain stones can cure illnesses – for example, the 12 o’clock Stone near Nancledra in Cornwall can, it is said, cure children of rickets as long as they are not illegitimate or the ...

If you were born in the month of June, you are lucky enough to have three birthstones to call your own. June is one of only three months (the others are August and December) that has three birthstones ...

Abstract: The theory of the diffraction grating pair is developed by expanding the frequency dependence of the phase shift as far as the quadratic frequency term. The analogy between pulse compression ...