Image via Wikipedia
Extinguish
a candle and bring a new flame slowly into the smoke of the
extinguished one. Get close to, but do not touch, the wick of the
extinguished candle. What will happen? If you do it right, the smoke
will catch fire and re-ignite the wick, as seen here.
This happens because the smoke contains wax from the recently
extinguished candle; the wax is highly flammable, and creates a pathway
back to the wick upon which the new flame may travel.
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