Cooking food properly is the only way of completely destroying harmful bacteria as improperly cooked food can give you food poisoning. To check whether foods have been properly cooked, ensure that they are steaming hot. Before eating cooked food, especially meat it is important to cut with a small knife in the middle and check that it is steaming hot in the middle. You can use a cooking thermometer to determine if the food has been cooked properly. For most food, the heating temperature should be over 70C for at least two minutes in the middle of the boiling food.

Knots can save spelunkers from being buried under rock. Many knots can also be used as makeshift tools, for example, the bowline can be used as a rescue loop, and the munter hitch can be used for belaying. In hazardous environments such as mountains, knots are very important. We are more human than the beings whereby we should learn as we cannot evovle like beings,,,.