Venturing out into the thermal pool, the swimmer let out a sigh of relief as the hot water eased her aching back.

Thermal materials were used when building the house to keep the inside of the home warm during the winter.

Many of the campers wore warm thermal underwear to keep themselves from freezing on the trip.

The middle schoolers designed a thermal energy project that showed how heat moves through a home.

Shivering as she grasped her thermal blanket, the lost hiker hoped its warmth would be enough to help her survive the frigid mountain temperatures.