Laura Zpěváková
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The young asteroid Vesta started off as a round protoplanet, but a massive collision early in its life caused it to become more elliptical in shape and created the giant crater Rheasilvia, scientists say. This image is an artist's illustration of that catastrophic event.

Artist's concept showing an impact that created the giant Rheasilvia crater on the protoplanet Vesta. Most of today's asteroids may have been created by such massive collisions long ago, a new study suggests.

The best hotels in each USA state: Exterior of the Seelbach Hilton in Louisville, Ky. - Fschulenburg via wikipedia

Before you visit the Derby City, get Travel Channel's suggestions on where to stay, where to eat and what to do in Louisville, KY.

Quartz:amethyst Resembling a monarch's scepter, this type of growth oddity is called scepterism. This specimen shows amethyst-topped rock crystal quartz. This happens when a second crystal (the amethyst) grew on top of the clear rock crystal after the rock crystal has stopped growing.

This specimen shows amethyst-topped rock crystal quartz. This happens when a second crystal (the amethyst) grew on top of the clear rock crystal after the rock crystal has stopped growing.