While some gems may appear colorless in daylight, under ultraviolet light they can burn a bright blue or green.

FORBES: Cindy Chao's Butterfly Brooch Added to Smithsonian Gem Hall

Again we sense this instinctively--the pleasure we feel when a tooth stops hurting reminds us that we live our life in contexts and contrasts, and so perhaps you can argue that only by witnessing, and confronting, great evil were the forces of light able to burn most bright.

CNN: The necessary evil?

Maybe, with a little nudging, one by one, flickers of light will start to burn in their heads.

FORBES: Minnesota Government To Re-open As Gov. Dayton Caves On Tax Increases

With a fuel burn 30% less than a typical light jet and a cruise speed of more than 345 mph, the King Air 250 really zips along.

FORBES: The Most Successful Aircraft Design Gets Even Better

Heat a gas grill to medium-high or light a charcoal fire and let it burn just until the coals are covered with gray ash.

NPR: A Meal Fit For A Candidate: Barack Obama

Gretzky then made his way to the harbour to light a second cauldron outside in the harbour area which will burn for the 17 days of competition.

BBC: Winter Olympics start despite luge tragedy