They are designed to be inherently stable in flight; if disturbed by a gust of wind or a thermal current they will return automatically to stable flight.

On its arrival this atmospheric weakness allowed thunderstorms to barge high into the sky as daytime heat forced thermal currents upwards.

Its wide valley sides are perfect for generating the thermal currents needed for great hot-air ballooning.

But close to the oil installations, the only signs of wildlife are the vultures circling on thermal currents above flare stacks burning off unwanted gas and emitting an acrid smell.

This compensates for density and temperature differences, which duct sound above or below a thermal layer by reflection.

A submarine can likewise monitor surface combatants by floating the tail of its array above a thermal layer while lurking below.

As the satellite enters the atmosphere, the thermal layer will produce an artificial aurora to give a signal of the satellite's re-entry.

Based on thermal layer stress the risk of crack formation exists.

Thermal layers, waterproof socks, waterproof gloves, windproof jacket, glasses, woolly hat, helmet and a slimy pair of dungarees with hefty padding in the private-parts area.

A solar thermal panel on the side of the building provides much of the hot water needed in the house.

In addition, thermal panel measurements lead to a better understanding of snow shedding mechanisms.

Solar thermal panels heat water and can cut out the need for a boiler, but they cost about 7,500.

The houses will be built using timber, solar thermal panels, double glazing, insulation and biomass boilers that do not use fossil fuels.

It draws water from an aquifer more than 250ft below ground and uses solar thermal panels on the roof to heat the water.

Minimal work was done until 1883, when a thermal plant was built to process the extracted sulfur.

So will solar thermal plants secure the planet's future?

Other expenses relate to the cost of bringing old thermal plants out of retirement to meet the demand for power.

The plant load factor of thermal plants has gone up from the low sixties in 1991 to 72.7 per cent in 2003-4.

Large hydropower and thermal plants dominate the current expansion plans.

The heat from the styling tool activates the treatment's thermal technology to eliminate frizz.

But it employs older, thermal technology using the sun's energy to make steam to drive a turbine power generator.

The stand also includes photovoltaic solar roof panels, solar thermal technology and a water collection and recycling system.

The companys solar thermal technology uses trough-shaped mirrors, standard piping and a glasshouse structure.

The installation uses parabolic trough solar thermal technology along with natural gas to generate electricity.

How about snorkelling on the edge of a submerged volcano, swimming through the tiny bubbles from thermal vents as you watch dazzling reef fish?

These 'extremophiles' can cope with the high temperatures of hot springs and deep sea thermal vents, which are often also highly acidic or abound with sulphur.

Extremophile micro-organisms can, thus, metabolise carbon monoxide in such locations as the thermal vents of volcanoes.

Other scientific research has focused on two other potential reducing environments: outer space and deep-sea thermal vents.

The bubble takes them to the entrance of a cave filled with boiling hot thermal vents.

It appeared that they were engaged in unlawful culinary activity in a thermal water feature.

Seven years in the making, the brand's new hydrating serum locks its thermal water into skin.

The spa used to be more popular, but then it lost majority of its thermal water.

Thermal water springs underlie the development of health tourism.

Precipitation continues until the carbon dioxide in the thermal water reaches equilibrium with the carbon dioxide in the atmosphere.