How much of the energy produced by incandescent lamps results in heat, not light?

a.  10%
b.  25%
c.  50%
d.  90%

Answer: d. (Source: FlexYourPower.org)

Bonus question:

According to the International Institute for Species Exploration at Arizona State University, new species that were discovered in 2008 included:

a.  Caffeine-free coffee beans
b.  Bacteria that live in hair spray
c.  A snail whose shell twists around four axes
d.  All of the above

Answer: d