Friction is a force that opposes the motion of two surfaces in contact with each other. It plays an essential role in our daily lives, as it is responsible for providing grip, reducing wear and tear ...

The Philadelphia LNG Task Force's third public meeting at Widener University brought in a full house. Chairs had to be brought in to accomodate people standing in the back of Lathem Hall. (Kenny ...

UNESCO and the Advisory Bodies to the World Heritage Committee have issued new guidance for assessing impacts from projects that could potentially affect the planet’s most precious heritage places.