When there are more free radicals present than can be kept in balance by antioxidants, the free radicals can start doing damage to fatty tissue, DNA, and proteins in your body.

Ever wonder why the slow moving sloth has a slightly greenish hue? Ever consider the sloth at all? Well, perhaps not. Location, location, location, is the mantra for many of us in our macro world, but it is also true for the small world of algae.

The Miocene pillow basalts from the Lake Roosevelt National Recreation Area of central Washington hold an unlikely fossil mold of a small rhinoceros, preserved by sheer chance as it's bloated carcass sunk to the bottom of a shallow pool or lake just prior to a volcanic explosion. We've known about this gem for a long while now. The fossil was discovered by hikers back in 1935 and later cast by University of California paleontologists in 1948.

Quintus Sertorius, a Roman statesman come general, grew up in Umbria, the green heart of what is now central Italy.

Born into a world at war just two years before the Romans sacked Corinth to bring Greece under Roman rule, Quintus lived much of his life as a military man far from the hills, mountains, and valleys of his birthplace. In 81 BC, he traveled to Morocco, the land of opium, massive trilobites and the birthplace of Antaeus, the legendary North African ogre who was killed by the Greek hero Heracles.

The Earth has a magnetic field with north and south poles. The magnetic field of the Earth is surrounded by the magnetosphere that keeps most of the particles from the Sun from hitting the Earth.