Air bubbles in candle gel, light micrograph
Light micrograph of air bubbles captured in transparent candle gel. Candle gel is a clear, viscous combination of paraffin and mineral oil which can be burned similarly to candle wax. To produce these bubbles, the candle gel was heated, then poured into a beaker. Air was then injected into the gel using a syringe., by PHILIPPE LEBEAUX/SCIENCE PHOTO LIBRARY
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