Thermophiles or thermophilic organisms are those that have the ability to survive extremely high temperature usually above 100 degrees. They are a group of extremophiles, a group of organisms that are capable of existing at extreme conditions such as high or low temperatures, pressure, etc.
<em>Normal bacteria would have been killed by the heat of boiling for several hours but thermophilic bacteria will survive and hence, were able to grow back.</em>
