Incubation is the process of keeping something warm and protected while it develops. Birds incubate their eggs by sitting on them, using their body heat to help the baby birds grow inside until they're ready to hatch. Without this careful warming, the eggs would stay cold and the chicks inside couldn't develop properly.

Different birds incubate for different lengths of time: chicken eggs take about three weeks, while an albatross might incubate its egg for over two months.

In hospitals, tiny premature babies sometimes need incubators, which are special warm boxes that protect them and help them grow stronger, just like an eggshell protects a developing chick. Scientists also use incubators to grow bacteria or cells at just the right temperature for experiments.

The word has spread beyond its original meaning. When you have the seed of an idea but it's not fully formed yet, you might let it incubate in your mind for a while, giving it time to develop. Some businesses even have incubation programs where new companies get support and resources as they grow. In all these cases, incubation means providing the right conditions for something to develop and eventually emerge ready for the world.