Hold up a ball of clay about the size of a ping pong ball and ask students if they think it will sink or float in water. Place the clay in the water. Do you think that if I use ½-the amount of clay ...

This video show that the sticky heavy flocs of clay and carbon (upper right) sink quickly, collecting more organic carbon as they fall through the water column.

A Long Island man ended up sinking waist-deep into mud in a Smithtown park Thursday, getting stuck for nearly an hour.

From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there are techniques for everyone. Learn how to use metering, considering composition and shoot everything from ...